Route limitations, sometimes called fleet restrictions, usually refer to bus services that have regulations on fleet deployments, such as vehicle length, vehicle height, or various environmental factors. The Land Transport Authority (LTA) may also set restrictions on the buses deployed on certain bus routes by the public bus operators.
Non-Deployment of High Capacity Buses by Bus Services
1. Non-Deployment of Double-Deck Buses on Operational Bus Services
| Service | Fleet Restriction | Reason(s) | Effective Date |
| 3A | Single-deck buses only | Insufficient passenger demand with occasional deployments | 4 Sep 2016 |
| 9B | Single-deck buses only | Insufficient passenger demand | Since introduction (27 Nov 2023) |
| 11 | Single-deck buses only | Insufficient passenger demand | Since introduction (14 Apr 1990) |
| 14e | Single-deck buses only | Insufficient passenger demand with occasional deployments | Since introduction (12 Dec 2005) |
| 15, 15A | Single-deck buses only | Narrow lanes along Joo Chiat Pl & Telok Kurau Rd | 5 Oct 1997 |
| 18, 18A | Single-deck buses only | Insufficient passenger demand with past permanent deployments | 2004 |
| 18M | Single-deck buses only | Narrow lanes along Tampines St 96 | Since introduction (22 Feb 2026) |
| 24 | Single-deck buses only | Low headroom in Changi Airport Passenger Terminal Buildings (PTBs) 1, 2 & 3 | Since introduction (25 Jun 1983) |
| 26 | Single-deck buses only | Insufficient passenger demand with past permanent deployments | 2003 |
| 27 | Single-deck buses only | Low headroom in Changi Airport Passenger Terminal Buildings (PTBs) 1, 2 & 3 | Since introduction (24 Jan 1988) |
| 27A | Insufficient passenger demand | Since introduction (30 Dec 2002) | |
| 29 | Single-deck buses only | Narrow lanes along Netheravon Rd & Cranwell Rd | Since 26 Jul 1987 |
| 29A | Insufficient passenger demand | Since introduction (4 Mar 2013) | |
| 30e | Single-deck buses only | Insufficient passenger demand | Since introduction (19 Sep 2005) |
| 32 | Single-deck buses only | Narrow lanes along Frankel Ave | Since introduction (11 Apr 1971) |
| 33, 33B | Single-deck buses only | Narrow lanes along Telok Kurau Rd, Joo Chiat Pl & Tembeling Rd | Since introduction (11 Apr 1971) |
| 33A | Insufficient passenger demand | Since introduction (2002) | |
| 34, 34B | Single-deck buses only | Low headroom in Changi Airport Passenger Terminal Buildings (PTBs) 1, 2 & 3 | Since introduction (31 Jul 2005) |
| 34A | Insufficient passenger demand | Since introduction (28 Mar 2011) | |
| 36, 36A | Single-deck buses only | Low headroom in Changi Airport Passenger Terminal Buildings (PTBs) 1, 2 & 3 | Since introduction (31 Jan 1994, as Service 16E) |
| 36B | Insufficient passenger demand | Since introduction (2009) | |
| 38 | Single-deck buses only | Insufficient passenger demand | Since introduction (7 Apr 2002) |
| 39B | Single-deck buses only | Insufficient passenger demand | Since introduction (27 May 2024) |
| 40 | Single-deck buses only | Narrow lanes along Siglap Rd | 3 May 1992 |
| 42 | Single-deck buses only | Narrow roads in Kembangan & Siglap estates | Since introduction (5 Nov 1989, as Service M2) |
| 43e | Single-deck buses only | Insufficient passenger demand | Since introduction (9 Sep 2019) |
| 44 | Single-deck buses only | Low headroom in Changi Airport Passenger Terminal Buildings (PTBs) 1, 2 & 3 | Since introduction (10 Nov 2025) |
| 53, 53A | Single-deck buses only | Low headroom in Changi Airport Passenger Terminal Buildings (PTBs) 1, 2 & 3 | 23 Apr 1995 |
| 53M | Insufficient passenger demand | Since introduction (16 Aug 2015) | |
| 56 | Single-deck buses only | Insufficient passenger demand | 4 Jan 2025 |
| 57 | Single-deck buses only | Narrow lanes along Depot Rd | Since introduction (31 Jul 2005) |
| 63 | Single-deck buses only | Narrow lanes along Redhill Cl, Redhill Rd & Jln Rumah Tinggi | 23 May 1993 |
| 63M | Insufficient passenger demand | Since introduction (12 Mar 2012) | |
| 73 | Single-deck buses only | Low headroom under Braddell Flyover | 20 Jun 1983 |
| Narrow lanes along S’goon Nth Ave 3, S’goon Nth Ave 4 & S’goon Nth Ave 5 | 20 Sep 1992 | ||
| 75 | Single-deck buses only | Insufficient passenger demand | Since introduction (15 Jun 1981) |
| 77 | Single-deck buses only | Narrow lanes along Sixth Ave | 1996 |
| 84G, 84W | Single-deck buses only | Insufficient passenger demand with past permanent deployments | 21 Apr 2025 |
| 86A | Single-deck buses only | Insufficient passenger demand | Since introduction (24 Jun 2024) |
| 92 | Single-deck buses only | Narrow roads in Mt Sinai estate | Since introduction (11 Sep 1989, as Service M1) |
| Narrow lanes along Science Pk Dr | 17 Jan 1994 (as Service M1) | ||
| 92A, 92B | Since introduction (25 Aug 2024) | ||
| 93 | Single-deck buses only | Insufficient passenger demand with past permanent deployments | 2010 |
| 94A | Single-deck buses only | Insufficient passenger demand | Since introduction (2001) |
| 95B | Single-deck buses only | Insufficient passenger demand with occasional deployments | 2011 |
| 100, 100A | Single-deck buses only | Narrow lanes along Upp Aljunied Rd | Since introduction (11 Apr 1971) |
| 102B | Single-deck buses only | Insufficient passenger demand | Since introduction (9 Oct 2023) |
| 105 | Single-deck buses only | Low headroom under Braddell Flyover | 3 May 1992 |
| 105B | Insufficient passenger demand | Since introduction (1999) | |
| 110 | Single-deck buses only | Low headroom in Changi Airport Passenger Terminal Buildings (PTBs) 1, 2 & 3 | Since introduction (22 Oct 2017) |
| 112 | Single-deck buses only | Narrow lanes along Hougang St 92 | Since introduction (15 Feb 2004) |
| 112A, 112B | Insufficient passenger demand | Since introduction (15 Feb 2004) | |
| 113, 113A | Single-deck buses only | Narrow lanes along Hougang St 11 | Since introduction (15 Feb 2004) |
| 115 | Single-deck buses only | Insufficient passenger demand | Since introduction (30 Oct 2004) |
| 116, 116A | Single-deck buses only | Narrow lanes along S’goon Nth Ave 3, S’goon Nth Ave 4 & S’goon Nth Ave 5 | Since introduction (18 Nov 2012) |
| 120 | Single-deck buses only | Narrow lanes along Telok Blangah Hts, Telok Telok Blangah St 32, Telok Blangah Dr & Telok Blangah St 31 | Since introduction (21 Apr 2013) |
| 122 | Single-deck buses only | Narrow lanes along C’wealth Dr | Since introduction (15 Mar 2015) |
| 123M | Single-deck buses only | Insufficient passenger demand | Since introduction (28 Jan 2008) |
| 124 | Single-deck buses only | Narrow lanes along Telok Blangah Hts, Telok Blangah St 31 & Telok Blangah Dr | 23 Nov 2003 |
| 125A | Single-deck buses only | Insufficient passenger demand | Since introduction (2010) |
| 127A | Single-deck buses only | Insufficient passenger demand with occasional deployments | Since introduction (18 Dec 2016) |
| 129A, 129B | Single-deck buses only | Insufficient passenger demand | Since introduction (26 Aug 2024) |
| 131, 131A | Single-deck buses only | Narrow lanes along Norfolk Rd, Owen Rd, Dorset Rd & Kent Rd | 3 May 1992 |
| 135 | Single-deck buses only | Narrow lanes along Upp Aljunied Rd | 19 Apr 1987 |
| Narrow lanes along Telok Kurau Rd, Frankel Ave & Jln Kembangan | 28 Feb 2021 | ||
| Narrow lanes along Haig Rd | 13 Apr 2025 | ||
| 136 | Single-deck buses only | Insufficient passenger demand | 4 Sep 2016 |
| 137 | Single-deck buses only | Narrow roads in Kaki Bt Ind Est | Since introduction (21 Oct 2017) |
| 137A | Insufficient passenger demand | Since introduction (11 Feb 2019) | |
| 138, 138A, 138C | Single-deck buses only | Narrow lanes along Mandai Rd & Mandai Lake Rd | Since introduction (26 Apr 1994) |
| 138M | Insufficient passenger demand | Since introduction (15 Mar 2025) | |
| 139A | Single-deck buses only | Insufficient passenger demand | Since introduction (12 Dec 2022) |
| 140 | Single-deck buses only | Narrow roads in St. George’s Est | Since introduction (14 Dec 2014) |
| 141 | Single-deck buses only | Narrow lanes along Norfolk Rd, Owen Rd & Kent Rd | Since introduction (9 Jun 2013) |
| 142, 142A | Single-deck buses only | Narrow roads in Potong Pasir Est | Since introduction (25 Nov 1984) |
| 145A | Single-deck buses only | Insufficient passenger demand | Since introduction (28 Jun 2010) |
| 146 | Single-deck buses only | Insufficient passenger demand | Since introduction (25 Feb 2024) |
| 148 | Single-deck buses only | Narrow roads in Potong Pasir Est | Since introduction (20 Apr 2025) |
| 150 | Single-deck buses only | Narrow lanes along Joo Chiat Pl & Telok Kurau Rd | Since introduction (20 Mar 2016) |
| 155 | Single-deck buses only | Narrow lanes along Upp Aljunied Rd | Since introduction (11 Apr 1971) |
| Narrow lanes along Joo Chiat Pl & Telok Kurau Rd | |||
| 156 | Single-deck buses only | Narrow lanes along Sixth Ave | Since introduction (5 Dec 1993) |
| 158, 158A | Single-deck buses only | Insufficient passenger demand | Since introduction (8 Aug 1971) |
| 159 | Single-deck buses only | Low headroom under Braddell Flyover | 20 Jun 1983 |
| Narrow lanes along S’goon Nth Ave 5 & S’goon Nth Ave 6 | 18 Feb 2001 | ||
| 159A | Since introduction (6 Apr 2009) | ||
| 159B | Insufficient passenger demand | Since introduction (7 Jan 2013) | |
| 160 | SPAD-registered single-deck buses only | Low headroom in W’lands & Johor Bahru Checkpts & narrow roads in Johor Bahru | Since introduction (5 Sep 2004) |
| 160A | Single-deck buses only | Insufficient passenger demand | Since introduction (19 Nov 2018) |
| 162 | Single-deck buses only | Insufficient passenger demand | Since introduction (25 Feb 2001) |
| 167 | Single-deck buses only | Insufficient passenger demand with occasional deployments | 17 Dec 2023 |
| 170 | SPAD-registered single-deck buses only | Low headroom in W’lands & Johor Bahru Checkpts & narrow roads in Johor Bahru | Since introduction (11 Apr 1971) |
| 170X | Since introduction (10 Nov 2003) | ||
| 173 | Single-deck buses only | Narrow roads in Princess Elizabeth Est | Since introduction (11 Apr 1971) |
| Narrow roads in Toh Tuck est | 7 Apr 1991 | ||
| Narrow lanes along Bt Batok St 21 | 3 May 1992 | ||
| 173A | Since introduction (5 Nov 2007) | ||
| 174e | Single-deck buses only | Insufficient passenger demand with occasional deployments | Since introduction (28 Mar 2005) |
| 175 | Single-deck buses only | Narrow lanes along Depot Rd | Since introduction (11 Mar 2007) |
| 177 | Single-deck buses only | Narrow lanes along Gombak Dr & within MINDEF CP | Since introduction (26 Apr 1989) |
| 188e | Single-deck buses only | Insufficient passenger demand | 1 Sep 2016 |
| 191 | Single-deck buses only | Narrow lanes along Portsdown Rd | Since introduction (29 May 1988) |
| 194 | Single-deck buses only | Insufficient passenger demand with past occasional deployments during special events at former Jurong Bird Pk | 3 Jan 2023 |
| 195, 195A | Single-deck buses only | Narrow lanes along Depot Rd | 18 Dec 1988 |
| Narrow lanes along C’wealth Dr | |||
| 196e | Single-deck buses only | Insufficient passenger demand | Since introduction (12 Dec 2005) |
| 200, 200A | Single-deck buses only | Narrow lanes along Sth Buona Vista Rd | Since introduction (11 Apr 1971) |
| 222A | Single-deck buses only | Insufficient passenger demand | Since introduction (11 Apr 2011) |
| 228 | Single-deck buses only | Insufficient passenger demand | Since introduction (15 Sep 1980) |
| 229 | Single-deck buses only | Insufficient passenger demand | Since introduction (15 Sep 1985, as Service 219) |
| 230 | Single-deck buses only | Narrow lanes along Toa Payoh East & Kim Keat Ave | Since introduction (24 Sep 2023) |
| Narrow lanes along Lor 8 Toa Payoh | 26 Jan 2025 | ||
| Narrow lanes along Lor 7 Toa Payoh | |||
| 230M | Narrow lanes along Toa Payoh East & Kim Keat Ave | Since introduction (8 Jun 2025) | |
| 231 | Single-deck buses only | Narrow lanes along Lor 5 Toa Payoh | 11 Mar 2012 |
| 232 | Single-deck buses only | Narrow lanes along Toa Payoh East & Lor 7 Toa Payoh | 19 May 2002 |
| 235 | Single-deck buses only | Narrow lanes along Lor 5 Toa Payoh | Since introduction (26 Dec 1983) |
| Narrow lanes along Lor 3 Toa Payoh | |||
| Narrow lanes along Toa Payoh East | 31 Jan 2010 | ||
| 238 | Single-deck buses only | Narrow lanes along Toa Payoh East & Lor 8 Toa Payoh | Since introduction (26 Dec 1983) |
| 240M | Single-deck buses only | Insufficient passenger demand with occasional deployments | Since introduction (1 Sep 2016) |
| 261 | Single-deck buses only | Narrow lanes along Ang Mo Kio Ind Pk 1 | 5 Jul 1981 |
| 262 | Single-deck buses only | Narrow lanes along Ang Mo Kio St 11 | Sep 1985 |
| 265 | Single-deck buses only | Narrow lanes along Ang Mo Kio St 11 | 24 Mar 2002 |
| 268, 268A | Single-deck buses only | Narrow lanes along Ang Mo Kio Ind Pk 2 (West) | Since introduction (30 Mar 1980, as Service 263) |
| Narrow lanes along Ang Mo Kio Ind Pk 2 (East) | 24 Mar 2002 | ||
| 268B, 268C | Insufficient passenger demand | Since introduction (1 Sep 2016) | |
| 269, 269A | Single-deck buses only | Insufficient passenger demand | Since introduction (10 Apr 1983) |
| 272 | Single-deck buses only | Insufficient passenger demand | Since introduction (28 Sep 1980) |
| 273 | Single-deck buses only | Narrow lanes along Telok Blangah Hts, Telok Blangah St 32 & Telok Blangah Dr | Since introduction (28 Sep 1980) |
| 284 | Single-deck buses only | Narrow cul-de-sac along Clementi Ave 4 | Since introduction (16 Jul 1979) |
| 292 | Single-deck buses only | Narrow lanes along Tampines St 22 | Since introduction (20 Feb 1983) |
| Narrow lanes along Tampines Lane & Tampines St 11 | 19 Jun 1988 | ||
| 296 | Single-deck buses only | Narrow lanes along Tampines Nth Dr 2 | Since introduction (28 Apr 2024) |
| 299 | Single-deck buses only | Narrow lanes along Tampines St 96, Tampines St 95 & Tampines St 94 | Since introduction (27 Apr 2025) |
| 300 | Single-deck buses only | Insufficient passenger demand | 18 Mar 2024 |
| 307 | Single-deck buses only | Narrow lanes along Choa Chu Kang Ctrl & Teck Whye Lane | 31 Oct 2001 |
| 307A | Insufficient passenger demand | Since introduction (1 Sep 2016) | |
| 315 | Single-deck buses only | Narrow lanes along S’goon Nth Ave 3 & S’goon Nth Ave 4 | 11 Jun 1995 |
| Narrow lanes along S’goon Nth Ave 5 | 30 Jan 2011 | ||
| 317 | Single-deck buses only | Narrow lanes in S’goon Gdn Est | Since introduction (31 Oct 1977) |
| 325 | Single-deck buses only | Insufficient passenger demand | Since introduction (8 Jan 1995) |
| 329 | Single-deck buses only | Insufficient passenger demand | Since introduction (9 Jul 2017) |
| 354 | Single-deck buses only | Narrow lanes along Pasir Ris Cl | Since introduction (2 Feb 1997) |
| Narrow lanes along Jln Loyang Besar | 25 Apr 2010 | ||
| 358 | Single-deck buses only | Narrow lanes along Pasir Ris St 41 | Since introduction (2 Feb 1997) |
| 359 | Single-deck buses only | Narrow lanes along Pasir Ris St 71 | Since introduction (23 Feb 1997) |
| Narrow lanes along Pasir Ris St 51 | 6 Sep 1998 | ||
| 371 | Single-deck buses only | Narrow lanes along Rivervale Cres | Since introduction (19 Jan 2014) |
| 372 | Single-deck buses only | Insufficient passenger demand | Since introduction (22 Dec 2000) |
| 374 | Single-deck buses only | Insufficient passenger demand | Since introduction (12 Mar 2017) |
| 381 | Single-deck buses only | Insufficient passenger demand | Since introduction (12 Mar 2017) |
| 382A | Single-deck buses only | Insufficient passenger demand | Since introduction (1 Jul 2019) |
| 384 | Single-deck buses only | Insufficient passenger demand | Since introduction (27 Dec 2020) |
| 386, 386A | Single-deck buses only | Insufficient passenger demand with past permanent deployments | 1 Jan 2024 |
| 400 | Single-deck buses only | Insufficient passenger demand with past permanent deployments | 5 May 2024 |
| 401 | Single-deck buses only | Narrow lanes along East Coast Pk Svc Rd | Since introduction (24 Oct 1976) |
| Narrow lanes along Siglap Rd | 21 Sep 1997 | ||
| 403 | Single-deck buses only | Narrow lanes along Elias Rd & Pasir Ris Rd | Since introduction (3 Apr 1977) |
| 405 | Single-deck buses only | Narrow lanes along Old Choa Chu Kang Rd (End) | Since introduction (18 Jul 1993) |
| 410G | Single-deck buses only | Narrow lanes along Bishan St 12 (westbound) | Since introduction (3 May 1992) |
| 454 | Single-deck buses only | Narrow lanes along Tampines St 85 & Tampines St 86 | Since introduction (9 Dec 2024, as Service 298X) |
| 456 | Single-deck buses only | Insufficient passenger demand | 24 Nov 2025 |
| 457 | Single-deck buses only | Insufficient passenger demand | Since introduction (23 Mar 2026) |
| 458 | Single-deck buses only | Insufficient passenger demand | Since introduction (23 Mar 2026) |
| 459 | Single-deck buses only | Insufficient passenger demand | Since introduction (27 Apr 2026) |
| 460 | Single-deck buses only | Narrow lanes along Tampines Nth Dr 2 | Since introduction (27 Apr 2026) |
| 461 | Single-deck buses only | Insufficient passenger demand | Since introduction (27 Jul 2026) |
| 666 | Single-deck buses only | Insufficient passenger demand | Since PTO takeover (2 Mar 2020) |
| 667 | Single-deck buses only | Narrow cul-de-sac along Clementi Ave 4 | Since PTO takeover (9 Mar 2020) |
| 668 | Single-deck buses only | Insufficient passenger demand | Since PTO takeover (14 Dec 2020) |
| 673 | Single-deck buses only | Insufficient passenger demand | Since introduction (14 Oct 2024) |
| 675 | Single-deck buses only | Insufficient passenger demand | Since introduction (2 Jan 2025) |
| 676 | Single-deck buses only | Insufficient passenger demand | Since introduction (2 Jan 2025) |
| 677 | Single-deck buses only | Insufficient passenger demand | Since introduction (2 Jan 2025) |
| 679 | Single-deck buses only | Insufficient passenger demand | Since introduction (15 Dec 2025) |
| 680 | Single-deck buses only | Insufficient passenger demand | Since introduction (15 Dec 2025) |
| 681 | Single-deck buses only | Insufficient passenger demand | Since introduction (15 Dec 2025) |
| 682 | Single-deck buses only | Insufficient passenger demand | Since introduction (15 Dec 2025) |
| 683 | Single-deck buses only | Insufficient passenger demand | Since introduction (15 Dec 2025) |
| 684 | Single-deck buses only | Insufficient passenger demand | Since introduction (15 Jun 2026) |
| 803 | Single-deck buses only | Insufficient passenger demand | Since introduction (16 Feb 2014) |
| 805 | Single-deck buses only | Insufficient passenger demand | Since introduction (14 Feb 2016) |
| 825 | Midibuses & single-deck buses only | Narrow lanes in Lentor estate | Since introduction (17 Aug 1988) |
| 852 | Single-deck buses only | Insufficient passenger demand | Since introduction (8 Dec 1985) |
| 858, 858B | Single-deck & articulated buses only | Full route deployment for double-deck buses not permitted due to low headroom in Changi Airport Passenger Terminal Buildings (PTBs) 1, 2 & 3 | 2 Nov 1997 |
| 858A | Insufficient passenger demand | Since introduction (2000) | |
| 860 | Single-deck buses only | Insufficient passenger demand | 15 Oct 2017 |
| 871, 871A | Single-deck buses only | Narrow lanes along Bt Batok East Ave 5 & Bt Batok St 52 | Since introduction (21 Jul 2024) |
| 882A | Single-deck buses only | Insufficient passenger demand | Since introduction (18 Aug 2014) |
| 902 | Single-deck buses only | Insufficient passenger demand | Since introduction (17 Apr 2006) |
| 904 | Single-deck buses only | Insufficient passenger demand | Since introduction (18 Aug 2013) |
| 911A | Single-deck buses only | Insufficient passenger demand | Since introduction (11 Mar 2024) |
| 912 | Single-deck and articulated buses only | Insufficient passenger demand for intra-town travel, with past permanent deployments | 13 Jun 2021 |
| 913M | Single-deck buses only | Narrow lanes along W’lands St 32 | Since introduction (17 Mar 2019) |
| 920 | Single-deck buses only | Insufficient passenger demand with past permanent deploymens | 2020 |
| 925, 925A | Single-deck buses only | Narrow 3-point turn at Kranji Resvr CP B | Since introduction (7 Apr 1986) |
| 927 | Single-deck buses only | Narrow lanes along Mandai Lake Rd | Since introduction (9 Apr 1995) |
| 945 | Single-deck buses only | Narrow lanes along Bt Batok East Ave 5 & Bt Batok St 52 | Since introduction (6 Apr 1986, as Service 365) |
| 950 | SPAD-registered single-deck buses only | Low headroom in W’lands & Johor Bahru Checkpts & narrow roads in Johor Bahru | Since introduction (19 Sep 2004) |
| 962B, 962C | Single-deck buses only | Insufficient passenger demand | Since introduction (26 Aug 2013) |
| 967 | Single-deck buses only | Insufficient passenger demand | Since introduction (12 Jan 2025) |
| 969A | Single-deck buses only | Insufficient passenger demand | Since introduction (15 Jul 2013) |
| 970 | Single-deck buses only | Narrow lanes along Sixth Ave | Since introduction (20 Aug 2000) |
| 973 | Single-deck buses only | Narrow lanes along Dairy Farm Rd | Since introduction (26 Feb 2017) |
| 973A | Insufficient passenger demand | Since introduction (13 Jan 2019) | |
| 976 | Single-deck buses only | Insufficient passenger demand | Since introduction (10 Nov 2019) |
| 983M | Single-deck buses only | Insufficient passenger demand | Since introduction (18 Mar 2024) |
| 993 | Single-deck buses only | Insufficient passenger demand | Since introduction (26 Jul 2020, as Service 160M) |