This article reflects the changes in routes for operational City Direct bus services since their launch in 2013 under the Bus Service Enhancement Programme (BSEP). For more information on the exact operating hours and calling bus stops of City Direct bus services, please click on the links to their individual bus service articles attached in their headings.
Tower Transit Bus Service 651 (since 2 Sep 2013)
| Year | AM Peak | PM Peak |
| 2013 | Jurong West Ave 3, Jurong West Ave 5, Jurong West St 74, Jurong West St 75, Jurong West St 82, Jurong West St 81, Jurong West St 71, Jurong West St 61, Boon Lay Way, Pioneer Rd North, AYE, Keppel Rd, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, Keppel Rd, AYE, Pioneer Rd North, Boon Lay Way, Jurong West St 61, Jurong West St 71, Jurong West St 81, Jurong West St 82, Jurong West St 75, Jurong West St 74, Jurong West Ave 5 and Jurong West Ave 3. |
SBS Transit Bus Service 652 (since 6 Jan 2014)
| Year | AM Peak | PM Peak |
| 2014 | Upp Thomson Rd, Yio Chu Kang Rd, Ang Mo Kio Ave 5, Ang Mo Kio Ave 4, Ang Mo Kio Ave 3, Ang Mo Kio Ave 10, Ang Mo Kio Ave 1, CTE, Buyong Rd, Orchard Rd, Bras Basah Rd, Nicoll Highway, Esplanade Dr, Fullerton Rd, Collyer Quay, Raffles Quay and Shenton Way. | Anson Rd, Robinson Rd, Collyer Quay, Fullerton Rd, Esplanade Dr, Stamford Rd, Orchard Rd, Penang Rd, Buyong Rd, CTE, Ang Mo Kio Ave 1, Ang Mo Kio Ave 10, Ang Mo Kio Ave 3, Ang Mo Kio Ave 4, Ang Mo Kio Ave 5, Yio Chu Kang Rd and Upp Thomson Rd. |
Tower Transit Bus Service 653 (since 13 Jan 2014)
| Year | AM Peak | PM Peak |
| 2014 | Hume Ave, Upp Bt Timah Rd, Hillview Rd, Hillview Ave, Bt Batok East Ave 2, Bt Batok East Ave 3, PIE, Clementi Ave 6, AYE, Keppel Rd, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, Keppel Rd, AYE, Clementi Ave 6, PIE, Bt Batok East Ave 3, Bt Batok East Ave 2, Hillview Ave, Hume Ave, Upp Bt Timah Rd, Hillview Rd and Hillview Ave. |
SBS Transit Bus Service 654 (since 20 Jan 2014)
| Year | AM Peak | PM Peak |
| 2014 | Anchorvale St, Compassvale St, Rivervale Dr, Sengkang East Ave, Sengkang East Dr, Buangkok East Dr, KPE, ECP, Sheares Ave, Central Blvd and Shenton Way. | Anson Rd, Robinson Rd, Finlayson Green, Marina Blvd, Sheares Ave, ECP, KPE, Buangkok East Dr, Sengkang East Dr, Sengkang East Ave, Rivervale Dr, Compassvale St and Anchorvale St. |
SBS Transit Bus Service 655 (since 17 Feb 2014)
| Year | AM Peak | PM Peak |
| 2023 | West Coast Rd, Teban Gdns Rd, Pandan Gdns, West Coast Rd, West Coast Highway, West Coast Rd, Clementi Rd, West Coast Highway, Labrador Viaduct, Keppel Rd, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, Keppel Rd, Labrador Viaduct, West Coast Highway, Clementi Rd, West Coast Rd, West Coast Highway, West Coast Rd, Pandan Gdns, Teban Gdns Rd and West Coast Rd. |
| 2014 | West Coast Rd, Teban Gdns Rd, Jurong Town Hall Rd, Pandan Gdns, West Coast Rd, West Coast Highway, West Coast Rd, Clementi Rd, West Coast Highway, Labrador Viaduct, Keppel Rd, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, Keppel Rd, Labrador Viaduct, West Coast Highway, Clementi Rd, West Coast Rd, West Coast Highway, West Coast Rd, Pandan Gdns, Jurong Town Hall Rd, Teban Gdns Rd and West Coast Rd. |
Tower Transit Bus Service 656 (since 17 Feb 2014)
| Year | AM Peak | PM Peak |
| 2014 | Canberra Rd, Admiralty Lane, Admiralty Lk, Sembawang Dr, Sembawang Ave, Sembawang Rd, Upp Thomson Rd, SLE, CTE, Buyong Rd, Orchard Rd, Bras Basah Rd, Nicoll Highway, Esplanade Dr, Fullerton Rd, Collyer Quay, Raffles Quay and Shenton Way. | Anson Rd, Robinson Rd, Collyer Quay, Fullerton Rd, Esplanade Dr, Stamford Rd, Orchard Rd, Penang Rd, Buyong Rd, CTE, SLE, Upp Thomson Rd, Sembawang Rd, Sembawang Ave, Sembawang Dr, Admiralty Lk, Admiralty Lane and Canberra Rd. |
Tower Transit Bus Service 657 (since 24 Feb 2014)
| Year | AM Peak | PM Peak |
| 2014 | Jurong West Ave 1, Jurong East Ave 1, Toh Guan Rd, Jurong East St 11, Jurong Town Hall Rd, AYE, Keppel Rd, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, Keppel Rd, AYE, Jurong Town Hall Rd, Jurong East St 11, Toh Guan Rd, Jurong East Ave 1 and Jurong West Ave 1. |
SBS Transit Bus Service 660 (since 23 Jun 2014)
| Year | AM Peak | PM Peak |
| 2014 | Buangkok Green, Hougang St 93, Hougang St 91, Hougang Ave 4, Hougang Ave 8, Hougang Ave 2, Ang Mo Kio Underpass, Ang Mo Kio Ave 3, CTE, Buyong Rd, Orchard Rd, Bras Basah Rd, Nicoll Highway, Esplanade Dr, Fullerton Rd, Collyer Quay, Raffles Quay and Shenton Way. | Anson Rd, Robinson Rd, Collyer Quay, Fullerton Rd, Esplanade Dr, Stamford Rd, Orchard Rd, Penang Rd, Buyong Rd, CTE, Ang Mo Kio Ave 3, Ang Mo Kio Underpass, Hougang Ave 2, Hougang Ave 8, Hougang Ave 4, Hougang St 91, Hougang St 93 and Buangkok Green. |
Go-Ahead Bus Service 661 (since 22 Sep 2015)
| Year | AM Peak | PM Peak |
| 2015 | Pasir Ris Dr 3, Pasir Ris Dr 6, Pasir Ris St 11, Pasir Ris Dr 1, Loyang Ave, TPE, PIE, KPE, MCE, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, MCE, KPE, PIE, TPE, Loyang Ave, Pasir Ris Dr 1, Pasir Ris St 11, Pasir Ris Dr 6 and Pasir Ris Dr 3. |
Tower Transit Bus Service 663 (since 28 Sep 2015)
| Year | AM Peak | PM Peak |
| 2015 | Yishun Ave 6, Yishun St 31, Yishun Ring Rd, Yishun Ave 11, Yishun Ctrl, Yishun Ave 2, Lentor Ave, SLE, CTE, Buyong Rd, Orchard Rd, Bras Basah Rd, Nicoll Highway, Esplanade Dr, Fullerton Rd, Collyer Quay, Raffles Quay and Shenton Way. | Anson Rd, Robinson Rd, Collyer Quay, Fullerton Rd, Esplanade Dr, Stamford Rd, Orchard Rd, Penang Rd, Buyong Rd, CTE, SLE, Lentor Ave, Yishun Ave 2, Yishun Ctrl, Yishun Ave 11, Yishun Ring Rd, Yishun St 31 and Yishun Ave 6. |
SMRT Bus Service 665 (since 12 Oct 2015)
| Year | AM Peak | PM Peak |
| 2015 | Marsiling Dr, Marsiling Lane, Marsiling Rd, Marsiling Rise, Woodlands Ave 5, Woodlands Ave 4, Woodlands Ave 1, Woodlands Ave 12, SLE, CTE, Buyong Rd, Orchard Rd, Bras Basah Rd, Nicoll Highway, Esplanade Dr, Fullerton Rd, Collyer Quay, Raffles Quay and Shenton Way. | Anson Rd, Robinson Rd, Collyer Quay, Fullerton Rd, Esplanade Dr, Stamford Rd, Orchard Rd, Penang Rd, Buyong Rd, CTE, SLE, Woodlands Ave 12, Woodlands Ave 1, Woodlands Ave 4, Woodlands Ave 5, Marsiling Rise, Marsiling Rd, Marsiling Lane and Marsiling Dr. |
Go-Ahead Bus Service 666 (since 29 Feb 2016)
| Year | AM Peak | PM Peak |
| 2016 | Punggol Dr, Punggol East, Punggol Field, Punggol Way, TPE, CTE, Chin Swee Rd, Outram Rd, Cantonment Rd, Keppel Rd, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, Keppel Rd, Cantonment Link, Cantonment Rd, Outram Rd, Chin Swee Rd, CTE, TPE, Punggol Way, Punggol Field, Punggol East and Punggol Dr. |
SBS Transit Bus Service 667 (since 8 Mar 2016)
| Year | AM Peak | PM Peak |
| 2016 | Clementi Ave 4, Clementi Ave 5, Clementi Ave 2, Commonwealth Ave West, Dover Ave, Dover Rd, Buona Vista Flyover, AYE, Keppel Rd, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, Keppel Rd, AYE, Buona Vista Flyover, Dover Rd, Dover Ave, Commonwealth Ave West, Clementi Ave 2, Clementi Ave 5 and Clementi Ave 4. |
SBS Transit Bus Service 668 (since 15 Mar 2016)
| Year | AM Peak | PM Peak |
| 2016 | Ang Mo Kio Ave 5, Ang Mo Kio Ave 4, Yio Chu Kang Rd, Ang Mo Kio Ave 6, Ang Mo Kio Ave 5, Ang Mo Kio St 53, Ang Mo Kio St 52, Ang Mo Kio Ave 10, Ang Mo Kio Ave 3, CTE, Outram Rd, Cantonment Rd, Keppel Rd, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, Keppel Rd, Cantonment Lk, Cantonment Rd, Outram Rd, CTE, Ang Mo Kio Ave 3, Ang Mo Kio Ave 10, Ang Mo Kio St 52, Ang Mo Kio St 53, Ang Mo Kio Ave 5, Ang Mo Kio Ave 6, Yio Chu Kang Rd, Ang Mo Kio Ave 4 and Ang Mo Kio Ave 5. |
Tower Transit Bus Service 670 (since 29 Mar 2016)
| Year | AM Peak | PM Peak |
| 2016 | Yishun Ave 7, Yishun Ave 6, Yishun Ave 9, Yishun Ring Rd, Yishun Ave 2, Lentor Ave, SLE, CTE, Outram Rd, Cantonment Rd, Keppel Rd, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, Keppel Rd, Cantonment Lk, Cantonment Rd, Outram Rd, CTE, SLE, Lentor Ave, Yishun Ave 2, Yishun Ring Rd, Yishun Ave 9, Yishun Ave 6 and Yishun Ave 7. |
SBS Transit Bus Service 671 (since 17 Oct 2016)
| Year | AM Peak | PM Peak |
| 2016 | Punggol Rd, Sengkang East Ave, Compassvale Rd, Compassvale Dr, Anchorvale Dr, Anchorvale Rd, Sengkang East Ave, Sengkang West Ave, Sengkang West Rd, Yio Chu Kang Rd, CTE, Outram Rd, Cantonment Rd, Keppel Rd, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, Keppel Rd, Cantonment Lk, Cantonment Rd, Outram Rd, CTE, Yio Chu Kang Rd, Sengkang West Rd, Sengkang West Ave, Sengkang East Ave, Anchorvale Rd, Anchorvale Dr, Compassvale Dr, Compassvale Rd, Sengkang East Ave and Punggol Rd. |
SBS Transit Bus Service 672 (since 7 Nov 2016)
| Year | AM Peak | PM Peak |
| 2016 | Hougang St 51, Buangkok Green, Hougang Ave 4, Hougang St 51, Hougang St 52, Hougang Ave 8, Upp Serangoon Rd, Hougang Ave 5, Hougang Ave 7, Tampines Rd, KPE, MCE, Anson Rd, Robinson Rd, Finlayson Green and Marina Blvd. | Central Blvd, Shenton Way, MCE, KPE, Tampines Rd, Hougang Ave 7, Hougang Ave 5, Upp Serangoon Rd, Hougang Ave 8, Hougang St 52, Hougang St 51, Buangkok Green, Hougang Ave 4 and Hougang St 51. |