History of Express Services 501 - 521 - Revision history

Singapore Buses: Source: https://eresources.nlb.gov.sg/newspapers/digitised/article/shinmin19970724-1.2.11.19

2026-04-15T09:44:35Z

Source: https://eresources.nlb.gov.sg/newspapers/digitised/article/shinmin19970724-1.2.11.19

← Older revision		Revision as of 17:44, 15 April 2026
Line 276:		Line 276:
	!style={{CSS/PAST\|xfc=\|xbc=}}\|Service changes		!style={{CSS/PAST\|xfc=\|xbc=}}\|Service changes
	\|-		\|-
	\|rowspan=2\|{{SBS}}		\|rowspan=3\|{{SBS}}
	\|rowspan=2\|{{Bus/D\|AM\|style=border:1px solid\|note=Tampines → Temasek Ave}}{{Bus/D\|PM\|style=border:1px solid\|note=Anson Rd → Tampines}}		\|rowspan=3\|{{Bus/D\|AM\|style=border:1px solid\|note=Tampines → Temasek Ave}}{{Bus/D\|PM\|style=border:1px solid\|note=Anson Rd → Tampines}}
	\|'''1997'''		\|rowspan=2\|'''1997'''
	\|'''5 May'''		\|'''5 May'''
	\|style='text-align:left'\|Introduced between Tampines Int and Temasek Ave (Opp Centennial Twr) during morning peak hours and between Anson Rd (Apex Tower) and Tampines Int during evening peak hours as a peak hour one-directional service on weekdays and Saturdays.		\|style='text-align:left'\|Introduced between Tampines Int and Temasek Ave (Opp Centennial Twr) during morning peak hours and between Anson Rd (Apex Tower) and Tampines Int during evening peak hours as a peak hour one-directional service on weekdays and Saturdays.
			\|-
			\|'''28 July'''
			\|style='text-align:left'\|Last bus (PM Peak) from Anson Rd revised to 1930 hrs on weekdays and 1430 hrs on Saturdays.
	\|-		\|-
	\|'''1999'''		\|'''1999'''

Singapore Buses: Source: https://eresources.nlb.gov.sg/newspapers/digitised/article/shinmin19970724-1.2.11.19

2026-04-15T09:41:50Z

Source: https://eresources.nlb.gov.sg/newspapers/digitised/article/shinmin19970724-1.2.11.19

← Older revision		Revision as of 17:41, 15 April 2026
Line 7:		Line 7:
	!style={{CSS/PAST\|xfc=\|xbc=}}\|Service changes		!style={{CSS/PAST\|xfc=\|xbc=}}\|Service changes
	\|-		\|-
	\|rowspan=7\|{{SBST}}<br>''Known as {{SBS}} prior to 1 November 2001''		\|rowspan=8\|{{SBST}}<br>''Known as {{SBS}} prior to 1 November 2001''
	\|{{Bus/D\|AM\|style=border:1px solid\|note=Hougang Ctrl → Penang Rd}}{{Bus/D\|PM\|style=border:1px solid\|note=Anson Rd → Hougang Ctrl}}		\|rowspan=2\|{{Bus/D\|AM\|style=border:1px solid\|note=Hougang Ctrl → Penang Rd}}{{Bus/D\|PM\|style=border:1px solid\|note=Anson Rd → Hougang Ctrl}}
	\|rowspan=2\|'''1997'''		\|rowspan=3\|'''1997'''
	\|'''5 May'''		\|'''5 May'''
	\|style='text-align:left'\|Introduced between Hougang Ctrl Int and Penang Rd (AM Peak) and between Anson Rd and Hougang Ctrl Int (PM Peak) as a peak hour one-directional service on weekdays and Saturdays.		\|style='text-align:left'\|Introduced between Hougang Ctrl Int and Penang Rd (AM Peak) and between Anson Rd and Hougang Ctrl Int (PM Peak) as a peak hour one-directional service on weekdays and Saturdays.
			\|-
			\|'''28 July'''
			\|style='text-align:left'\|Last bus (PM Peak) from Anson Rd revised to 1930 hrs on weekdays and 1430 hrs on Saturdays.
	\|-		\|-
	\|Hougang Ctrl ↺ Penang Rd		\|Hougang Ctrl ↺ Penang Rd

Kimminju at 08:04, 2 April 2026

2026-04-02T08:04:45Z

← Older revision		Revision as of 16:04, 2 April 2026
Line 172:		Line 172:
	\|'''2025'''		\|'''2025'''
	\|'''7 December'''		\|'''7 December'''
	\|style='text-align:left'\|Amended to ply Jurong West Ave 5, Jurong West St 74 with the partial closure of Jurong West St 75 to facilitate the construction of Gek Poh station on the Jurong Region Line.		\|style='text-align:left'\|Amended to ply Jurong West Ave 5 and Jurong West St 74 with the partial closure of Jurong West St 75 to facilitate the construction of Gek Poh station on the Jurong Region Line.
	\|}		\|}

Line 239:		Line 239:
	\|'''2025'''		\|'''2025'''
	\|'''7 December'''		\|'''7 December'''
	\|style='text-align:left'\|Amended to ply Jurong West Ave 5, Jurong West St 74 with the partial closure of Jurong West St 75 to facilitate the construction of Gek Poh station on the Jurong Region Line.		\|style='text-align:left'\|Amended to ply Jurong West Ave 5 and Jurong West St 74 with the partial closure of Jurong West St 75 to facilitate the construction of Gek Poh station on the Jurong Region Line.
	\|}		\|}

GoAheadAmbassador: /* Service 521 */ Standardization

2026-03-21T12:04:49Z

Service 521: Standardization

← Older revision		Revision as of 20:04, 21 March 2026
Line 746:		Line 746:
	\|'''2002'''		\|'''2002'''
	\|'''29 September'''		\|'''29 September'''
	\|style='text-align:left'\|Extended to Woodlands Reg Int, amended to ply Bt Batok East Ave 4, converted to trunk service and re-numbered Service 963, skipping Cashew ~~Road~~ and Bt Batok East Ave 6.		\|style='text-align:left'\|Extended to Woodlands Reg Int, amended to ply Bt Batok East Ave 4, converted to trunk service and re-numbered Service 963, skipping Cashew Rd and Bt Batok East Ave 6.
	\|}		\|}

Kimminju: /* Service 501X */

2025-11-22T22:39:16Z

Service 501X

← Older revision		Revision as of 06:39, 23 November 2025
Line 34:		Line 34:
	\|}		\|}

	==Service ~~501X~~==		==Service 501#==
	{\| class="wikitable" style='text-align:center'		{\| class="wikitable" style='text-align:center'
	!style={{CSS/PAST\|xfc=\|xbc=}}\|Operator		!style={{CSS/PAST\|xfc=\|xbc=}}\|Operator

Kimminju: /* Service 502A */

2025-11-21T09:56:41Z

Service 502A

← Older revision		Revision as of 17:56, 21 November 2025
Line 228:		Line 228:
	\|style='text-align:left'\|Temporarily suspended due to COVID-19 Circuit Breaker measures		\|style='text-align:left'\|Temporarily suspended due to COVID-19 Circuit Breaker measures
	\|-		\|-
	\|rowspan=2\|Soon Lee Bus Pk → Central Blvd		\|rowspan=3\|Soon Lee Bus Pk → Central Blvd
	\|'''2 June'''		\|'''2 June'''
	\|style='text-align:left'\|Resumed normal operations.		\|style='text-align:left'\|Resumed normal operations.
	\|-		\|-
	\|{{SMB}}<br>'''(Current)'''		\|rowspan=2\|{{SMB}}<br>'''(Current)'''
	\|'''2024'''		\|'''2024'''
	\|'''15 September'''		\|'''15 September'''
	\|style='text-align:left'\|Operations transferred to SMRT Buses.		\|style='text-align:left'\|Operations transferred to SMRT Buses.
			\|-
			\|'''2025'''
			\|'''7 December'''
			\|style='text-align:left'\|Amended to ply Jurong West Ave 5, Jurong West St 74 with the partial closure of Jurong West St 75 to facilitate the construction of Gek Poh station on the Jurong Region Line.
	\|}		\|}

Kimminju: /* Service 502 */

2025-11-21T09:56:03Z

Service 502

← Older revision		Revision as of 17:56, 21 November 2025
Line 161:		Line 161:
	\|style='text-align:left'\|Temporarily suspended due to COVID-19 Circuit Breaker measures.		\|style='text-align:left'\|Temporarily suspended due to COVID-19 Circuit Breaker measures.
	\|-		\|-
	\|rowspan=2\|Soon Lee Bus Pk ↺ Central Blvd		\|rowspan=3\|Soon Lee Bus Pk ↺ Central Blvd
	\|'''2 June'''		\|'''2 June'''
	\|style='text-align:left'\|Resumed normal operations.		\|style='text-align:left'\|Resumed normal operations.
	\|-		\|-
	\|{{SMB}}<br>'''(Current)'''		\|rowspan=2\|{{SMB}}<br>'''(Current)'''
	\|'''2024'''		\|'''2024'''
	\|'''15 September'''		\|'''15 September'''
	\|style='text-align:left'\|Operations transferred to SMRT Buses.		\|style='text-align:left'\|Operations transferred to SMRT Buses.
			\|-
			\|'''2025'''
			\|'''7 December'''
			\|style='text-align:left'\|Amended to ply Jurong West Ave 5, Jurong West St 74 with the partial closure of Jurong West St 75 to facilitate the construction of Gek Poh station on the Jurong Region Line.
	\|}		\|}

Calvinkulit: /* Service 521 */

2025-08-21T08:38:24Z

Service 521

← Older revision		Revision as of 16:38, 21 August 2025
Line 738:		Line 738:
	\|'''2002'''		\|'''2002'''
	\|'''29 September'''		\|'''29 September'''
	\|style='text-align:left'\|Extended to Woodlands Reg Int, amended to ply Bt Batok East Ave 4, converted to trunk service and re-numbered Service 963.		\|style='text-align:left'\|Extended to Woodlands Reg Int, amended to ply Bt Batok East Ave 4, converted to trunk service and re-numbered Service 963, skipping Cashew Road and Bt Batok East Ave 6.
	\|}		\|}

Kimminju: Created page with "==Service 501== {| class="wikitable" style='text-align:center' !style={{CSS/PAST|xfc=|xbc=}}|Operator !style={{CSS/PAST|xfc=|xbc=}}|Route !style={{CSS/PAST|xfc=|xbc=}}|Year !style={{CSS/PAST|xfc=|xbc=}}|Date !style={{CSS/PAST|xfc=|xbc=}}|Service changes |- |rowspan=7|{{SBST}}
''Known as {{SBS}} prior to 1 November 2001'' |{{Bus/D|AM|style=border:1px solid|note=Hougang Ctrl → Penang Rd}}{{Bus/D|PM|style=border:1px solid|note=Anson Rd → Hougang Ctrl}} |rowspan=2|'''..."

2025-08-11T20:58:04Z

Created page with "==Service 501== {| class="wikitable" style='text-align:center' !style={{CSS/PAST|xfc=|xbc=}}|Operator !style={{CSS/PAST|xfc=|xbc=}}|Route !style={{CSS/PAST|xfc=|xbc=}}|Year !style={{CSS/PAST|xfc=|xbc=}}|Date !style={{CSS/PAST|xfc=|xbc=}}|Service changes |- |rowspan=7|{{SBST}} ''Known as {{SBS}} prior to 1 November 2001'' |{{Bus/D|AM|style=border:1px solid|note=Hougang Ctrl → Penang Rd}}{{Bus/D|PM|style=border:1px solid|note=Anson Rd → Hougang Ctrl}} |rowspan=2|'''..."

New page

==Service 501==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=7|{{SBST}} ''Known as {{SBS}} prior to 1 November 2001''
|{{Bus/D|AM|style=border:1px solid|note=Hougang Ctrl → Penang Rd}}{{Bus/D|PM|style=border:1px solid|note=Anson Rd → Hougang Ctrl}}
|rowspan=2|'''1997'''
|'''5 May'''
|style='text-align:left'|Introduced between Hougang Ctrl Int and Penang Rd (AM Peak) and between Anson Rd and Hougang Ctrl Int (PM Peak) as a peak hour one-directional service on weekdays and Saturdays.
|-
|Hougang Ctrl ↺ Penang Rd
|'''22 December'''
|style='text-align:left'|Converted to a day service on weekdays and Saturdays, looping at Penang Rd.
|-
|rowspan=4|Sengkang ↺ Penang Rd
|'''2000'''
|'''10 September'''
|style='text-align:left'|Extended to Sengkang Ter.
|-
|'''2001'''
|'''28 April'''
|style='text-align:left'|Amended to Sengkang Temp Int.
|-
|rowspan=2|'''2003'''
|'''18 January'''
|style='text-align:left'|Amended to Sengkang Integrated Transport Hub.
|-
|'''27 July'''
|style='text-align:left'|Discontinued under North East Line Rationalisation Phase 2.
|}

==Service 501X==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=7|{{SBST}} ''Known as {{SBS}} prior to 1 November 2001''
|Hougang Ctrl ↺ Temasek Ave
|'''1997'''
|'''22 December'''
|style='text-align:left'|Introduced between Hougang Ctrl Int and Temasek Ave (Loop) as an alternate route of Service 501, operating during off peak periods on weekdays and Saturdays and throughout the day on Sundays and Public Holidays.
|-
|rowspan=4|Sengkang ↺ Temasek Ave
|'''2000'''
|'''10 September'''
|style='text-align:left'|Extended to Sengkang Ter.
|-
|'''2001'''
|'''28 April'''
|style='text-align:left'|Amended to Sengkang Temp Int.
|-
|rowspan=2|'''2003'''
|'''18 January'''
|style='text-align:left'|Amended to Sengkang Integrated Transport Hub.
|-
|'''27 July'''
|style='text-align:left'|Discontinued under North East Line Rationalisation Phase 2.
|}

==Service 502==
<onlyinclude>{| class="wikitable" style='text-align:center'
!style='{{CSS/BUS|xfc=|xbc=}}'|Operator
!style='{{CSS/BUS|xfc=|xbc=}}'|Route
!style='{{CSS/BUS|xfc=|xbc=}}'|Year
!style='{{CSS/BUS|xfc=|xbc=}}'|Date
!style='{{CSS/BUS|xfc=|xbc=}}'|Service changes
|-
|rowspan=23|{{SBST}} ''Known as {{SBS}} prior to 1 November 2001''
|rowspan=2|Hougang Ctrl ↔ Boon Lay
|'''1997'''
|'''5 May'''
|style='text-align:left'|Introduced between Hougang Ctrl Int and Boon Lay Int, operating daily.
|-
|'''1999'''
|{{TBC}}
|style='text-align:left'|Serves additional pair of bus stops outside and opposite The Synergy along Boon Lay Way.
|-
|Sengkang ↔ Boon Lay
|rowspan=2|'''2000'''
|'''10 September'''
|style='text-align:left'|Extended to Sengkang Ter.
|-
|rowspan=4|{{Bus/D|502|note=Sengkang ↔ Boon Lay}}{{Bus/D|502A|PAST|note=Sengkang → Grange Rd}}
|{{TBC}}
|style='text-align:left'|{{Bus/D|502A|PAST|note=Introduced from Sengkang Ter to Grange Rd (Opp Trader's Hotel), operating during the day daily.}}
|-
|'''2001'''
|'''28 April'''
|style='text-align:left'|Amended to Sengkang Temp Int.
|-
|'''2002'''
|'''7 July'''
|style='text-align:left'|Skips the bus stop opposite Mandarin Singapore along Orchard Rd.
|-
|rowspan=4|'''2003'''
|'''18 January'''
|style='text-align:left'|Amended to Sengkang Integrated Transport Hub.
|-
|rowspan=4|{{Bus/D|502|note=Boon Lay ↺ Temasek Ave}}{{Bus/D|502A|PAST|note=Boon Lay → Temasek Ave}}
|rowspan=3|'''27 July'''
|style='text-align:left'|{{Bus/D|502|note=Shortened to loop at Temasek Ave from Boon Lay Int under North East Line Rationalisation Phase 2.}}
|-
|style='text-align:left'|{{Bus/D|502A|PAST|note=Amended to start from Boon Lay Int and terminate at Temasek Ave (Opp The Ritz-Carlton) after the last bus of Service 502 daily under North East Line Rationalisation Phase 2.}}
|-
|style='text-align:left'|Serves additional pair of bus stops outside and opposite Holland Village along Holland Rd.
|-
|rowspan=3|'''2005'''
|'''2 July'''
|style='text-align:left'|Amended to ply Grange Rd with the partial closure of Somerset Rd.
|-
|rowspan=5|Pioneer Rd North ↺ Temasek Ave
|rowspan=2|'''26 December'''
|style='text-align:left'|{{Bus/D|502|note=Extended to start from Pioneer Rd Nth (Opp Blk 653B), amended to ply Toh Guan Rd in both directions and ply Orchard Turn, Scotts Rd, Stevens Rd, Whitley Rd, PIE and Toh Tuck Ave towards Pioneer Rd North.}}
|-
|style='text-align:left'|{{Bus/D|502A|PAST|note=Extended to operate between Pioneer Rd Nth and Temasek Ave (Loop) and converted to peak hour route variant on weekdays.}}
|-
|rowspan=2|'''2006'''
|'''18 June'''
|style='text-align:left'|Serves new pair of bus stops outside Blk 683A and outside Blk 691A CP along Jurong West Ctrl 1.
|-
|'''29 October'''
|style='text-align:left'|Serves relocated bus stop outside Orchard Stn along Orchard Turn.
|-
|'''2008'''
|'''15 June'''
|style='text-align:left'|Serves new pair of bus stops outside Blk 670A and outside Blk 678D along Jurong West St 64.
|-
|Soon Lee Bus Pk ↺ Temasek Ave
|'''2009'''
|'''23 February'''
|style='text-align:left'|Extended to Soon Lee Bus Pk.
|-
|Soon Lee Bus Pk ↺ Marina Stn Rd
|'''2010'''
|'''26 April'''
|style='text-align:left'|Amended to ply Bayfront Ave, Marina Stn Rd, ECP, AYE, Clementi Ave 6 and Commonwealth Ave West, skipping Raffles Ave, Stamford Rd, Orchard Rd, Penang Rd, Somerset Rd, Orchard Turn, Scotts Rd, Stevens Rd, Whitley Rd, PIE and Toh Tuck Ave.
|-
|rowspan=2|Soon Lee Bus Pk ↺ Marina St
|rowspan=2|'''2012'''
|'''14 January'''
|style='text-align:left'|Serves reinstated bus stop outside Marina Bay Stn along Marina St.
|-
|'''30 September'''
|style='text-align:left'|{{DWAB}}
|-
|Soon Lee Bus Pk ↺ Central Blvd
|'''2013'''
|'''29 December'''
|style='text-align:left'|Amended to ply Central Blvd, Shenton Way and Keppel Rd with the opening of MCE, skipping Marina Stn Rd and ECP.
|-
|{{N/A}}
|rowspan=2|'''2020'''
|'''8 April'''
|style='text-align:left'|Temporarily suspended due to COVID-19 Circuit Breaker measures.
|-
|rowspan=2|Soon Lee Bus Pk ↺ Central Blvd
|'''2 June'''
|style='text-align:left'|Resumed normal operations.
|-
|{{SMB}} '''(Current)'''
|'''2024'''
|'''15 September'''
|style='text-align:left'|Operations transferred to SMRT Buses.
|}

==Service 502A==
{| class="wikitable" style='text-align:center'
!style='{{CSS/BUS|xfc=|xbc=}}'|Operator
!style='{{CSS/BUS|xfc=|xbc=}}'|Route
!style='{{CSS/BUS|xfc=|xbc=}}'|Year
!style='{{CSS/BUS|xfc=|xbc=}}'|Date
!style='{{CSS/BUS|xfc=|xbc=}}'|Service changes
|-
|rowspan=11|{{SBST}}
|rowspan=4|Pioneer Rd North ↺ Temasek Ave
|'''2005'''
|'''27 December'''
|style='text-align:left'|Introduced between Pioneer Rd Nth (Opp Blk 653B) and Temasek Ave (Loop) as a peak hour variant of Service 502 on weekdays, skipping Jurong West Ave 1, Jurong East Ave 1, Toh Guan Rd and Boon Lay Way.
|-
|rowspan=2|'''2006'''
|'''18 June'''
|style='text-align:left'|Serves new pair of bus stops outside Blk 683A and outside Blk 691A CP along Jurong West Ctrl 1.
|-
|'''29 October'''
|style='text-align:left'|Serves relocated bus stop outside Orchard Stn along Orchard Turn.
|-
|'''2008'''
|'''15 June'''
|style='text-align:left'|Serves new pair of bus stops outside Blk 670A and outside Blk 678D along Jurong West St 64.
|-
|Soon Lee Bus Pk ↺ Temasek Ave
|'''2009'''
|'''23 February'''
|style='text-align:left'|Extended to Soon Lee Bus Pk.
|-
|Soon Lee Bus Pk → Marina Stn Rd
|'''2010'''
|'''26 April'''
|style='text-align:left'|Shortened to terminate at Marina Stn Rd (Marina Bay Stn) and revised to operate during weekday morning peak hours only.
|-
|rowspan=2|Soon Lee Bus Pk → Marina St
|rowspan=2|'''2012'''
|'''14 January'''
|style='text-align:left'|Serves reinstated bus stop outside Marina Bay Stn along Marina St.
|-
|'''30 September'''
|style='text-align:left'|{{DWAB}}
|-
|Soon Lee Bus Pk → Central Blvd
|'''2013'''
|'''29 December'''
|style='text-align:left'|Amended to terminate at Central Blvd (Downtown Stn) with the opening of MCE.
|-
|{{N/A}}
|rowspan=2|'''2020'''
|'''8 April'''
|style='text-align:left'|Temporarily suspended due to COVID-19 Circuit Breaker measures
|-
|rowspan=2|Soon Lee Bus Pk → Central Blvd
|'''2 June'''
|style='text-align:left'|Resumed normal operations.
|-
|{{SMB}} '''(Current)'''
|'''2024'''
|'''15 September'''
|style='text-align:left'|Operations transferred to SMRT Buses.
|}

==Service 502B==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=3|{{SBST}}
|rowspan=3|Jurong West Ave 1 ↺ Temasek Ave
|'''2005'''
|'''27 December'''
|style='text-align:left'|Introduced between Jurong West Ave 1 (Blk 538) and Temasek Ave (Loop) as a peak hour variant of Service 502 on weekdays.
|-
|'''2006'''
|'''29 October'''
|style='text-align:left'|Serves relocated bus stop outside Orchard Stn along Orchard Turn.
|-
|'''2010'''
|'''26 April'''
|style='text-align:left'|Discontinued.
|}

==Service 503==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{SBS}}
|rowspan=2|{{Bus/D|AM|style=border:1px solid|note=Tampines → Temasek Ave}}{{Bus/D|PM|style=border:1px solid|note=Anson Rd → Tampines}}
|'''1997'''
|'''5 May'''
|style='text-align:left'|Introduced between Tampines Int and Temasek Ave (Opp Centennial Twr) during morning peak hours and between Anson Rd (Apex Tower) and Tampines Int during evening peak hours as a peak hour one-directional service on weekdays and Saturdays.
|-
|'''1999'''
|'''30 August'''
|style='text-align:left'|Extended to start from Pasir Ris Int, extended to loop at Telok Blangah Rd, converted to full day service and re-numbered as Service 505.
|}

==Service 505==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{SBS}}
|rowspan=2|Pasir Ris ↺ Telok Blangah Rd
|'''1999'''
|'''30 August'''
|style='text-align:left'|Re-numbered from Service 503 as a service between Pasir Ris Int and Telok Blangah Rd (Loop), operating daily.
|-
|'''2000'''
|'''10 September'''
|style='text-align:left'|Shortened to loop at Temasek Ave and re-numbered as Service 518.
|}

==Service 506==
{| class="wikitable" style='text-align:center'
!style='{{CSS/BUS|xfc=|xbc=}}'|Operator
!style='{{CSS/BUS|xfc=|xbc=}}'|Route
!style='{{CSS/BUS|xfc=|xbc=}}'|Year
!style='{{CSS/BUS|xfc=|xbc=}}'|Date
!style='{{CSS/BUS|xfc=|xbc=}}'|Service changes
|-
|rowspan=19|{{SBST}} '''(Current)''' ''Known as {{SBS}} prior to 1 November 2001''
|Jurong East ↔ Bedok
|'''1999'''
|'''30 August'''
|style='text-align:left'|Introduced between Jurong East Int and Bedok Int, operating daily.
|-
|rowspan=5|Jurong East ↔ Changi Airport
|rowspan=3|'''2000'''
|rowspan=3|'''10 September'''
|style='text-align:left'|Extended to Changi Airport.
|-
|style='text-align:left'|Serves additional pair of bus stops outside and opposite Trellis Twrs along Jln Toa Payoh.
|-
|style='text-align:left'|Last bus from Jurong East Int extended to 2210 hrs daily.
|-
|'''2001'''
|{{TBC}}
|style='text-align:left'|Serves new pair of bus stops opposite Blk 761 and opposite Baywater along Bedok Nth Ave 3.
|-
|rowspan=3|'''2002'''
|{{TBC}}
|style='text-align:left'|Serves new pair of bus stops opposite and between Blks 731 and 734 along Bedok Reservoir Rd.
|-
|rowspan=3|Jurong East ↔ Bedok
|rowspan=2|'''15 September'''
|style='text-align:left'|Shortened back to Bedok Int.
|-
|style='text-align:left'|Last bus from Jurong East Int extended to 2230 hrs daily.
|-
|rowspan=3|'''2006'''
|{{TBC}}
|style='text-align:left'|Skips a pair of removed bus stops outside and opposite Bedok Green Sec Sch along Bedok Nth Ave 3.
|-
|rowspan=6|Jurong East ↔ Upp East Coast
|rowspan=2|'''12 November'''
|style='text-align:left'|Extended to Upp East Coast Ter.
|-
|style='text-align:left'|Last bus from Jurong East Int reverted to 2200 hrs daily.
|-
|'''2010'''
|'''13 February'''
|style='text-align:left'|Serves new pair of bus stops outside and opposite Blk 220 CP along Bedok Nth Ave 3.
|-
|'''2011'''
|'''17 December'''
|style='text-align:left'|Amended to Jurong East Temp Int.
|-
|'''2012'''
|'''30 September'''
|style='text-align:left'|{{DWAB}}
|-
|'''2017'''
|'''23 April'''
|style='text-align:left'|Serves relocated bus stop before PIE along Bt Batok Rd.
|-
!{{N/A}}
|rowspan=3|'''2020'''
|'''15 April'''
|style='text-align:left'|Temporarily suspended due to COVID-19 Circuit Breaker measures.
|-
|rowspan=2|Jurong East ↔ Upp East Coast
|'''2 June'''
|style='text-align:left'|Resumed normal operations.
|-
|'''6 December'''
|style='text-align:left'|Amended to relocated Jurong East Temp Int.
|-
|Jurong East ↔ Serangoon
|'''2021'''
|'''12 December'''
|style='text-align:left'|Shortened to Serangoon Int under Downtown Line Stage 3 Rationalisation.
|}

==Service 507==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{SBST}} ''Known as {{SBS}} prior to 1 November 2001''
|rowspan=2|{{Bus/D|AM|style=border:1px solid|note=Boon Lay → Shenton Way}}{{Bus/D|PM|style=border:1px solid|note=Anson Rd → Boon Lay}}
|'''1999'''
|'''30 August'''
|style='text-align:left'|Introduced between Boon Lay Int and Shenton Way (Opp Temasek Twr) during morning peak hours and between Anson Rd (Intl Plaza) and Boon Lay Int during evening peak hours as a peak hour one-directional service on weekdays and Saturdays.
|-
|'''2004'''
|'''22 August'''
|style='text-align:left'|Discontinued.
|}

==Service 508==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=4|{{SBS}}
|{{Bus/D|AM|style=border:1px solid|note=Sengkang → Penang Rd}}{{Bus/D|PM|style=border:1px solid|note=Anson Rd → Sengkang}}
|rowspan=3|'''1999'''
|'''30 August'''
|style='text-align:left'|Introduced between Sengkang Ter and Penang Rd (Park Mall) during morning peak hours and between Anson Rd (Apex Twr) and Sengkang Ter during evening peak hours as a peak hour one-directional service on weekdays and Saturdays.
|-
|rowspan=3|{{Bus/D|AM|style=border:1px solid|note=Sengkang → Penang Rd}}{{Bus/D|PM|style=border:1px solid|note=Outram Rd → Sengkang}}
|rowspan=2|'''22 November'''
|style='text-align:left'|Serves an additional bus stop outside Outram Pk Stn along Outram Rd and 2 additional bus stops opposite Maritime Hse and outside Southpoint along Cantonment Rd during morning peak hours.
|-
|style='text-align:left'|Extended to start from Outram Rd (Outram Pk Stn) during evening peak hours.
|-
|'''2000'''
|'''4 September'''
|style='text-align:left'|Shortened to Hougang Ctrl Temp Ter and re-numbered Service 511.
|}

==Service 511==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{SBST}} ''Known as {{SBS}} prior to 1 November 2001''
|rowspan=2|{{Bus/D|AM|style=border:1px solid|note=Hougang Ctrl Temp Int → Penang Rd}}{{Bus/D|PM|style=border:1px solid|note=Outram Rd → Hougang Ctrl Temp Int}}
|'''2000'''
|'''4 September'''
|style='text-align:left'|Re-numbered from Service 508 as a peak-hour one-directional service between Hougang Ctrl Temp Ter and Penang Rd (Park Mall) during morning peak hours and between Outram Rd (Outram Pk Stn) and Hougang Ctrl Temp Ter during evening peak hours on weekdays and Saturdays.
|-
|'''2003'''
|'''27 July'''
|style='text-align:left'|Discontinued under North East Line Rationalisation Phase 2.
|}

==Service 512==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=3|{{SBST}} ''Known as {{SBS}} prior to 1 November 2001''
|rowspan=3|{{Bus/D|AM|style=border:1px solid|note=Hougang Ctrl Temp Int → Orchard Rd}}{{Bus/D|PM|style=border:1px solid|note=Moulmein Rd → Hougang Ctrl Temp Int}}
|'''2000'''
|'''4 September'''
|style='text-align:left'|Introduced between Hougang Ctrl Temp Ter and Orchard Rd (Le Meridien Shop Ctr) during morning peak hours and between Moulmein Rd (Opp Tan Tock Seng Hosp) and Hougang Ctrl Temp Ter during evening peak hours as a peak hour one-directional service on weekdays and Saturdays.
|-
|'''2002'''
|'''7 July'''
|style='text-align:left'|Skips the bus stop outside Orchard Emerald along Orchard Rd.
|-
|'''2003'''
|'''27 July'''
|style='text-align:left'|Discontinued under North East Line Rationalisation Phase 2.
|}

==Service 513==
{| class="wikitable" style='text-align:center'
!style='{{CSS/BUS|xfc=|xbc=}}'|Operator
!style='{{CSS/BUS|xfc=|xbc=}}'|Route
!style='{{CSS/BUS|xfc=|xbc=}}'|Year
!style='{{CSS/BUS|xfc=|xbc=}}'|Date
!style='{{CSS/BUS|xfc=|xbc=}}'|Service changes
|-
|rowspan=8|{{SBST}} '''(Current)'''
|rowspan=5|{{Bus/D|AM|style=border:1px solid|note=Tampines Ave 5 → Shenton Way}}{{Bus/D|PM|style=border:1px solid|note=Anson Rd → Tampines Ave 5}}
|'''2012'''
|'''17 December'''
|style='text-align:left'|Introduced between Tampines Ave 5 (Darul Ghufran Mque) and Shenton Way (Opp MAS Bldg) during morning peak hours and between Anson Rd (Hub Synergy Pt) and Tampines Ave 5 (Opp Darul Ghufran Mque) during evening peak hours, operating 2 trips in each direction as a peak hour one-directional service on weekdays under the LTA's Bus Service Enhancement Programme (BSEP).
|-
|rowspan=3|'''2013'''
|'''31 March'''
|style='text-align:left'|{{DWAB}}<ref>[//www.sbstransit.com.sg/news/sbs-transit-rolls-out-nine-new-wheelchair-accessible-bus-services "SBS Transit Rolls Out Nine New Wheelchair Accessible Bus Services"] SBS Transit, 25 March 2013</ref>
|-
|'''1 December'''
|style='text-align:left'|Serves new bus stop outside Downtown Stn along Central Blvd.
|-
|'''30 December'''
|style='text-align:left'|Amended to ply Sheares Ave towards Shenton Way with the partial closure of ECP.
|-
|'''2015'''
|'''12 January'''
|style='text-align:left'|3rd AM peak trip added at 0738 hrs.
|-
!{{N/A}}
|rowspan=2|'''2020'''
|'''8 April'''
|style='text-align:left'|Temporarily suspended due to COVID-19 Circuit Breaker measures.
|-
|{{Bus/D|AM|style=border:1px solid|note=Tampines Ave 5 → Shenton Way}}{{Bus/D|PM|style=border:1px solid|note=Anson Rd → Tampines Ave 5}}
|'''2 June'''
|style='text-align:left'|Resumed normal operations.
|}

==Service 518==
{| class="wikitable" style='text-align:center'
!style='{{CSS/BUS|xfc=|xbc=}}'|Operator
!style='{{CSS/BUS|xfc=|xbc=}}'|Route
!style='{{CSS/BUS|xfc=|xbc=}}'|Year
!style='{{CSS/BUS|xfc=|xbc=}}'|Date
!style='{{CSS/BUS|xfc=|xbc=}}'|Service changes
|-
|rowspan=8|{{SBST}} ''Known as {{SBS}} prior to 1 November 2001''
|Pasir Ris ↺ Temasek Ave
|'''2000'''
|'''10 September'''
|style='text-align:left'|Re-numbered from Service 505 as a service between Pasir Ris Int and Temasek Ave (Loop).
|-
|rowspan=2|{{Bus/D|518|note=Pasir Ris ↺ Temasek Ave}}{{Bus/D|518A|PAST|note=Pasir Ris → Temasek Ave}}
|'''2001'''
|{{TBC}}
|style='text-align:left'|{{Bus/D|518A|PAST|note=Introduced from Pasir Ris Int to Temasek Ave (Opp Centennial Twr), operating during morning peak hours on weekdays.}}
|-
|'''2002'''
|'''7 July'''
|style='text-align:left'|Skips the bus stop outside Orchard Emerald along Orchard Rd.
|-
|rowspan=2|Pasir Ris ↺ Temasek Ave
|rowspan=2|'''2005'''
|rowspan=2|'''26 December'''
|style='text-align:left'|Amended to ply Pasir Ris Dr 3, Pasir Ris Dr 12 and Pasir Ris Dr 1, skipping Elias Rd.
|-
|style='text-align:left'|{{Bus/D|518A|PAST|note=Amended to loop at Temasek Ave and converted to peak hour route variant of Service 518 on weekdays.}}
|-
|rowspan=7|Pasir Ris ↺ Bayfront Ave
|'''2010'''
|'''26 April'''
|style='text-align:left'|Amended to ply Bayfront Ave, skipping Raffles Blvd and Republic Blvd.
|-
|rowspan=2|'''2012'''
|'''29 April'''
|style='text-align:left'|Serves new bus stop outside Blk 612 along Pasir Ris Dr 1.
|-
|'''3 December'''
|style='text-align:left'|{{DWAB}}
|-
|rowspan=15|{{GAS}} '''(Current)'''
|rowspan=2|'''2016'''
|'''18 September'''
|style='text-align:left'|Operations transferred to Go-Ahead Singapore.
|-
|'''23 September'''
|style='text-align:left'|Amended to ply KPE and PIE towards Pasir Ris Int, skipping Bedok Sth Ave 1, Bedok Sth Rd and Bedok Nth Ave 1.
|-
|rowspan=2|'''2017'''
|rowspan=2|'''21 October'''
|style='text-align:left'|Serves new pair of bus stops outside Tampines East Stn along Tampines Ave 2.
|-
|style='text-align:left'|Serves new bus stop outside Bedok Nth Stn along Bedok Nth Rd.
|-
!{{N/A}}
|rowspan=2|'''2020'''
|'''8 April'''
|style='text-align:left'|Temporarily suspended due to COVID-19 Circuit Breaker measures.
|-
|Pasir Ris ↺ Bayfront Ave
|'''2 June'''
|style='text-align:left'|Resumed normal operations.
|-
!{{N/A}}
|rowspan=2|'''2021'''
|'''15 September'''
|style='text-align:left'|Temporarily suspended due to the impact of COVID-19 on available manpower.
|-
|rowspan=7|Pasir Ris ↺ Bayfront Ave
|'''25 September'''
|style='text-align:left'|Resumed normal operations.
|-
|rowspan=2|'''2022'''
|'''30 October'''
|style='text-align:left'|Temporarily amended to ply Pasir Ris St 11 and Pasir Ris St 12 with the partial closure of Pasir Ris Dr 1 to facilitate the construction of Pasir Ris East station on the Cross Island Line.
|-
|'''27 November'''
|style='text-align:left'|Serves new pair of bus stops outside and opposite HomeTeamNS Bedok along Bedok Nth Rd.
|-
|rowspan=3|'''2023'''
|'''8 January'''
|style='text-align:left'|Skips the bus stop outside Newton Stn Exit B along Scotts Rd temporarily to facilitate upgrading works.
|-
|'''27 August'''
|style='text-align:left'|Serves reinstated bus stop outside Newton Stn Exit B along Scotts Rd.
|-
|'''8 October'''
|style='text-align:left'|Temporarily amended to ply Pasir Ris Dr 8 with the partial closure of Pasir Ris Dr 1 to facilitate the construction of Pasir Ris station on the Cross Island Line.
|-
|'''2025'''
|'''27 April'''
|style='text-align:left'|Amended to Pasir Ris Integrated Transport Hub.
|}

==Service 518A==
{| class="wikitable" style='text-align:center'
!style='{{CSS/BUS|xfc=|xbc=}}'|Operator
!style='{{CSS/BUS|xfc=|xbc=}}'|Route
!style='{{CSS/BUS|xfc=|xbc=}}'|Year
!style='{{CSS/BUS|xfc=|xbc=}}'|Date
!style='{{CSS/BUS|xfc=|xbc=}}'|Service changes
|-
|rowspan=4|{{SBST}}
|Pasir Ris ↺ Temasek Ave
|'''2005'''
|'''27 December'''
|style='text-align:left'|Introduced between Pasir Ris Int and Temasek Ave (Loop) as a peak hour variant of Service 518 on weekdays, skipping Tampines Ave 7, Tampines Ave 2, Tampines Ave 1, Tampines Ave 10 and Bedok North Rd.
|-
|rowspan=4|Pasir Ris → Bayfront Ave
|'''2010'''
|'''26 April'''
|style='text-align:left'|Shortened to terminate at Bayfront Ave (Opp Marina Bay Sands MICE) and revised to operate during weekday morning peak hours only.
|-
|rowspan=2|'''2012'''
|'''29 April'''
|style='text-align:left'|Serves new bus stop outside Blk 612 along Pasir Ris Dr 1.
|-
|'''3 December'''
|style='text-align:left'|{{DWAB}}
|-
|rowspan=11|{{GAS}} '''(Current)'''
|'''2016'''
|'''18 September'''
|style='text-align:left'|Operations transferred to Go-Ahead Singapore.
|-
!{{N/A}}
|rowspan=2|'''2020'''
|'''8 April'''
|style='text-align:left'|Temporarily suspended due to COVID-19 Circuit Breaker measures in Singapore until 1 June 2020.
|-
|Pasir Ris → Bayfront Ave
|'''2 June'''
|style='text-align:left'|Resumed normal operations.
|-
!{{N/A}}
|rowspan=2|'''2021'''
|'''15 September'''
|style='text-align:left'|Temporarily suspended due to the impact of COVID-19 on available manpower.
|-
|rowspan=7|Pasir Ris → Bayfront Ave
|'''25 September'''
|style='text-align:left'|Resumed normal operations.
|-
|rowspan=2|'''2022'''
|'''30 October'''
|style='text-align:left'|Temporarily amended to ply Pasir Ris St 11 and Pasir Ris St 12 with the partial closure of Pasir Ris Dr 1 to facilitate the construction of Pasir Ris East station on the Cross Island Line.
|-
|'''27 November'''
|style='text-align:left'|Serves new pair of bus stops outside and opposite HomeTeamNS Bedok along Bedok Nth Rd.
|-
|rowspan=3|'''2023'''
|'''8 January'''
|style='text-align:left'|Skips the bus stop outside Newton Stn Exit B along Scotts Rd temporarily to facilitate upgrading works.
|-
|'''27 August'''
|style='text-align:left'|Serves reinstated bus stop outside Newton Stn Exit B along Scotts Rd.
|-
|'''8 October'''
|style='text-align:left'|Temporarily amended to ply Pasir Ris Dr 8 with the partial closure of Pasir Ris Dr 1 to facilitate the construction of Pasir Ris station on the Cross Island Line.
|-
|'''2025'''
|'''27 April'''
|style='text-align:left'|Amended to Pasir Ris Integrated Transport Hub.
|}

==Service 518B==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{SBST}}
|rowspan=2|Tampines Ave 7 ↺ Temasek Ave
|'''2005'''
|'''27 December'''
|style='text-align:left'|Introduced between Tampines Ave 7 (Blk 370) and Temasek Ave (Loop) as a peak hour variant of Service 518 on weekdays.
|-
|'''2010'''
|'''26 April'''
|style='text-align:left'|Discontinued.
|}

==Service 520==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=5|{{TIBS}}
|rowspan=5|{{Bus/D|AM|style=border:1px solid|note=Yishun → Outram Rd}}{{Bus/D|PM|style=border:1px solid|note=New Bridge Rd → Yishun }}
|rowspan=2|'''1997'''
|'''5 May'''
|style='text-align:left'|Introduced between Yishun Int and Outram Rd (Opp Outram Pk Stn) during morning peak hours and between New Bridge Rd Ter and Yishun Int during evening peak hours as a peak hour one-directional service on weekdays and Saturdays.
|-
|'''7 December'''
|style='text-align:left'|Amended to ply Upp Pickering St, Sth Bridge Rd, Neil Rd and Cantonment Rd with the partial closure of New Bridge Rd to facilitate the construction of Chinatown station on the North East Line.
|-
|rowspan=2|'''2002'''
|'''20 April'''
|style='text-align:left'|Amended to ply the reinstated New Bridge Rd, skipping Upp Pickering St, Sth Bridge Rd, Neil Rd and Cantonment Rd.
|-
|{{TBC}}
|style='text-align:left'|Serves bus stop outside Blk 923 along Yishun Ave 2, skipping the bus stop outside Northpoint Shop Ctr.
|-
|'''2003'''
|'''24 August'''
|style='text-align:left'|Discontinued.
|}

==Service 521==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=4|{{TIBS}}
|rowspan=4|Bukit Panjang ↔ World Trade Ctr
|rowspan=2|'''1999'''
|'''1 September'''
|style='text-align:left'|Introduced between Bt Panjang Ter and World Trade Ctr Ter, operating daily.
|-
|'''26 December'''
|style='text-align:left'|Amended to Bt Panjang Int.
|-
|'''2000'''
|{{TBC}}
|style='text-align:left'|Serves additional pair of bus stops outside and opposite ITE Dover along AYE.
|-
|'''2002'''
|'''29 September'''
|style='text-align:left'|Extended to Woodlands Reg Int, amended to ply Bt Batok East Ave 4, converted to trunk service and re-numbered Service 963.
|}

==References==
<references/>

==See also==
* [[History of Bus Services]]

[[Category:Buses]]
[[Category:Go-Ahead Singapore]]
[[Category:SBS Transit]]
[[Category:SMRT Buses]]