History of Hougang Feeder Services

Service 321 (1982 - 2004)

Operator	Year	Date	Service changes
	1982	4 April	Introduced between Hougang St 21 Ter and Lor Ah Soo (Loop).
	1983	30 October	Amended to Hougang Int.
	1985	13 January	Amended to ply Hougang St 11 and Upp Paya Lebar Rd.
	1995	15 June	Amended to ply Tampines Rd and Upp Serangoon Rd towards Hougang Sth Int.
	1999	TBC	First bus brought forward to 0515 hrs on weekdays and Saturdays.
Template:SBS Transit	2004	15 February	Integrated with Service 326 to form Service 113 and discontinued with the closure of Hougang Sth Int.

Operator	Year	Date	Service changes
	1985	25 August	Introduced between Hougang Int and Hougang Ave 2 (Loop).
	1987	8 June	First bus brought forward to 0515 hrs daily.
	1987	23 August	Extended to loop at Hougang St 61.
	1997	TBC	Extended to loop at Hougang St 92, skipping Hougang St 61.
Template:SBS Transit	2004	15 February	Integrated with Service 327 to form Service 112 and discontinued with the closure of Hougang Sth Int.

Operator	Year	Date	Service changes
	1983	30 October	Introduced between Hougang Int and Hougang Ave 5 (Loop).
	1988	10 April	Integrated with Service 329 and extended to loop at Defu Ave 1.
	1992	29 March	Amended to ply Tampines Rd, skipping Upp Serangoon Rd, Hougang Ave 5 and Hougang Ave 7.
	1999	TBC	First bus revised to 0700 hrs daily. Last bus brought forward to 2400 hrs daily.
Template:SBS Transit	2002	24 February	Discontinued.

Operator	Year	Date	Service changes
Template:SBS Transit (Current)	2014	14 September	Introduced between Hougang Ctrl Int and Upp Serangoon View (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0545 hrs and 0030 hrs daily.
	2015	30 March	Designated wheelchair-accessible bus service (WAB).
	2015	21 November	Serves new bus stop opposite Blk 475B along Upp Serangoon Cres.

Operator	Year	Date	Service changes
	1995	8 January	Introduced between Hougang Ctrl Int and Buangkok Green Med Pk (Loop).
	1998	24 May	Amended to Hougang Ctrl Temp Int.
	1999	21 November	Extended to loop at Hougang St 91.
	2001	20 May	Amended back to Hougang Ctrl Int.
Template:SBS Transit (Current)	2003	20 June	Last bus extended to 0030 hrs daily.
	2004	26 December	Extended to ply Upp Serangoon Rd, Hougang Ave 2 and Hougang Ave 10.
	2012	3 December	Designated wheelchair-accessible bus service (WAB).

Operator	Year	Date	Service changes
	1993	3 January	Introduced between Hougang Int and Hougang Ave 6 (Loop) under TransitLink Network Integration Exercise Phase 11.
Template:SBS Transit	2004	15 February	Integrated with Service 321 to form Service 113 and discontinued with the closure of Hougang Sth Int.

Operator	Year	Date	Service changes
	1985	TBC	Introduced between Hougang Int and Hougang Ave 7 (Loop).
Template:SBS Transit	2004	15 February	Integrated with Service 322 to form Service 112 and discontinued with the closure of Hougang Sth Int.

Operator	Year	Date	Service changes
	1987	23 August	Introduced between Hougang Int and Hougang Ave 8 (Loop).
	1993	3 January	Amended to loop at Buangkok Green Med Pk under TransitLink Network Integration Exercise Phase 11.
	1995	11 June	Amended to ply Upp Serangoon Rd, skipping Tampines Rd and Hougang Ave 3.
	1999	14 March	Amended to loop at Hougang Ave 4, skipping Buangkok Green Med Pk.
Template:SBS Transit	2004	15 February	Discontinued with the introduction of Service 101 in conjunction with the closure of Hougang Sth Int.

Operator	Year	Date	Service changes
	1984	10 June	Introduced between Hougang Int and Defu Ave 1 (Loop).
	1988	10 April	Integrated with Service 323 and discontinued.

Operator	Year	Date	Service changes
Template:SBS Transit (Current)	2017	9 July	Introduced between Hougang Ctrl Int and Buangkok Cres (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0545 hrs and 0030 hrs daily. Wheelchair-accessible at launch.
	2018	23 December	Serves new bus stop opposite Blk 984A along Buangkok Lk.
	2022	13 March	Serves new bus stop opposite Blk 991A along Buangkok Cres.