History of Limited-stop Services 451 - 456

Service 451

Operator	Route	Year	Date	Service changes
(Current)	AMKeat Hong Lk → Bukit Batok West Ave 5 PMBukit Batok West Ave 5 → Keat Hong Lk	2025	17 November	Renumbered from Short-Trip 991C as a peak-hour one-directional service between Keat Hong Link (Opp Blk 816A) and Bukit Batok West Ave 5 (Bt Gombak Stn) during morning peak hours and between Bukit Batok West Ave 5 (Bt Gombak Stn) and Keat Hong Link (Blk 816B) during evening peak hours, operating between 0610 hrs – 0840 hrs and 1730 hrs – 2000 hrs on Weekdays under the LTA's Bus Connectivity Enhancement Programme (BCEP). Wheelchair-accessible bus service (WAB) at launch.

Operator	Route	Year	Date	Service changes
(Current)	AMTengah → Jln Jurong Kechil PMJln Jurong Kechil → Tengah	2025	17 November	Introduced as a peak-hour one-directional service between Tengah Int and Jalan Jurong Kechil (Beauty World Stn Exit C) during morning peak hours and between Jalan Jurong Kechil (Beauty World Stn Exit C) and Tengah Int during evening peak hours, operating between 0600 hrs – 0930 hrs and 1730 hrs – 2100 hrs on Weekdays under the LTA's Bus Connectivity Enhancement Programme (BCEP). Wheelchair-accessible bus service (WAB) at launch.

Operator	Route	Year	Date	Service changes
(Current)	AMTengah → Bukit Batok PMBukit Batok → Tengah	2025	17 November	Introduced as a peak-hour one-directional service between Tengah Int and Bukit Batok Int during morning peak hours and between Bukit Batok Int and Tengah Int during evening peak hours, operating between 0600 hrs – 0930 hrs and 1730 hrs – 2100 hrs on Weekdays under the LTA's Bus Connectivity Enhancement Programme (BCEP). Wheelchair-accessible bus service (WAB) at launch.

Operator	Route	Year	Date	Service changes
(Current)	Tampines North ↺ Tampines St 86	2025	24 November	Renumbered from Feeder Service 298X as a peak-hour loop service between Tampines North Int and Tampines St 86 (Loop), operating between 0630 hrs – 1000 hrs and 1600 hrs – 1930 hrs on Weekdays. Wheelchair-accessible bus service (WAB) at launch.

Operator	Route	Year	Date	Service changes
(Current)	Bukit Panjang ↺ Choa Chu Kang Cres	2025	24 November	Renumbered from Service 979X as a peak-hour loop service between Bukit Panjang Int and Choa Chu Kang Crescent (Loop), operating between 0630 hrs – 1000 hrs and 1615 hrs – 1945 hrs on Weekdays. Wheelchair-accessible bus service (WAB) at launch.

Operator	Route	Year	Date	Service changes
(Current)	St. Michael's ↺ Thomson Rd	2025	24 November	Renumbered from Service 21X as a peak-hour loop service between St. Michael's Ter and Thomson Rd (Loop), operating between 0630 hrs – 1000 hrs and 1615 hrs – 1945 hrs on Weekdays. Wheelchair-accessible bus service (WAB) at launch.