Editing SamTrans (section)

=== Routes ===
{{Main|List of SamTrans bus lines}}

Local routes have either two or three digits or a special designation (e.g., '''<span style="color:green;">ECR</span>'''). For three-digit routes, the first digit identifies a rail connection:

*'''<span style="color:blue;">1</span>''' – Connection to [[Bay Area Rapid Transit|BART]] stations only (primarily routes in [[Daly City, California|Daly City]], [[Colma, California|Colma]], [[South San Francisco, California|South San Francisco]] and [[San Bruno, California|San Bruno]])
*'''<span style="color:red;">2</span>''' – Connection to [[Caltrain]] stations only (primarily routes south of [[Millbrae, California|Millbrae]]) (Route '''<span style="color:red;">292</span>''', with service between San Francisco and [[San Mateo, California|San Mateo]], only began connecting to BART at Millbrae in 2022;<ref>{{cite web |title=Rider's Digest: Upcoming Service Changes Effective August 7, 2022 |url=https://www.samtrans.com/media/21041/download |website=SamTrans |access-date=4 April 2025}}</ref> since it originally served Caltrain stations but no BART stations, its first digit is '''<span style="color:red;">2</span>'''.)
*'''<span style="color:green;">3</span>''' – Connection to both BART and Caltrain stations ('''<span style="color:green;">ECR</span>''', previously designated '''<span style="color:green;">390</span>''' and '''<span style="color:green;">391</span>''', provides service between [[Palo Alto, California|Palo Alto]] and Daly City, '''<span style="color:green;">397</span>''' provides overnight service between San Francisco and Palo Alto as a part of the [[All Nighter (night bus service)|All Nighter]] network, and '''<span style="color:green;">ECR OWL</span>''', previously designated '''<span style="color:green;">399</span>''', provides overnight service between Daly City and [[San Francisco International Airport]] as a part of the All Nighter network.) 

All two-digit routes are community service routes. Most of these routes do not connect with rail and operate only on school days.

==== Express routes ====
[[Express bus]] routes are designated by two letters followed by X; previously, just one letter preceded the X. In December 2009, six express routes (DX, FX, MX, NX, PX, and RX)<ref>{{Cite web |date=December 2009 |title=Service Reductions & Alternate Transportation |url=http://samtrans.com/pdf/SamTrans_Service_Reduction_Elimination_Guide_2009.pdf |url-status=dead |archive-url=https://web.archive.org/web/20100115212056/http://samtrans.com/pdf/SamTrans_Service_Reduction_Elimination_Guide_2009.pdf |archive-date=January 15, 2010 |access-date=July 14, 2018 |publisher=SamTrans}}</ref> were eliminated due to high budget constraints; a seventh express route, Route CX, was redesignated Route 118, and then replaced by route PCX in 2024.<ref>{{cite web |title=Timetable Updates effective August 4, 2024 |url=https://www.samtrans.com/schedules/timetableupdates |website=SamTrans |access-date=4 April 2025}}</ref> In August 2018, express route, KX, was folded into Route 398,<ref name="RDigest-2018-08">{{Cite web |date=August 2018 |title=Rider's Digest |url=http://www.samtrans.com/Assets/Rider$!27s+Digest+-+August+2018.pdf |access-date=August 1, 2018 |publisher=samTrans}}</ref> which was replaced by new express route EPX in February 2024.<ref>{{cite web |title=Reimagine SamTrans Phase 3 Implementation |url=https://www.samtrans.com/media/32514/download |website=SamTrans |access-date=4 April 2025}}</ref> Express route FCX, between Foster City and San Francisco, debuted in August 2019<ref>{{cite web |title=Express Bus Service Foster City <=> San Francisco |url=https://www.samtrans.com/media/6393/download |website=SamTrans |access-date=4 April 2025}}</ref>

In April 2017, SamTrans identified fifteen potential express bus routes connecting the Peninsula counties of [[San Francisco County, California|San Francisco]], [[San Mateo County, California|San Mateo]], and [[Santa Clara County, California|Santa Clara]]. Most of the potential routes ran along [[Bayshore Freeway|U.S. 101]], and some were planned to take advantage of [[managed lane]]s to provide speedier service. By June 2018, the list of potential bus routes was reduced to eight.<ref>{{Cite web |date=2018 |title=US-101 Express Bus Feasibility Study |url=http://www.samtrans.com/Planning/Planning_and_Research/US-101_Express_Bus_Feasibility_Study.html |access-date=August 1, 2018 |publisher=SamTrans}}</ref><ref name="FEBFS-2018">{{Cite report |url=http://www.samtrans.com/Assets/_Planning/pdf/Final+Express+Bus+Feasibility+Study.pdf?v=2 |title=US-101 Express Bus Feasibility Study |date=November 2018 |publisher=samTrans |access-date=December 7, 2018}}</ref> The draft final report was released in November 2018, and the Board adopted it in December.<ref>{{Cite press release |title=SamTrans Board Adopts Express Bus Study |date=December 5, 2018 |publisher=samTrans |url=http://www.samtrans.com/about/MediaRelations/news/SamTrans_Board_Adopts_Express_Bus_Study.html |access-date=December 7, 2018}}</ref> SamTrans relaunched express bus service in August 2019 from [[Foster City, California|Foster City]] to downtown San Francisco along U.S. 101, followed by a second route in Spring/Summer of 2020 from Palo Alto to western San Francisco along [[Interstate 280 in California|I-280]].<ref>{{Cite news |last=Clark, Zachary |date=December 7, 2018 |title=Express buses set for rollout |work=San Mateo Daily Journal |url=https://www.smdailyjournal.com/news/local/express-buses-set-for-rollout/article_280ead82-f9d3-11e8-9047-671e56669479.html |access-date=December 7, 2018}}</ref> The Foster City–San Francisco route was launched as FCX in August 2019, but ridership and frequency have been adversely impacted by the [[COVID-19 pandemic in the San Francisco Bay Area]]. The launch of the other proposed express route planned for Phase 1, PAX (Palo Alto to western San Francisco), has been delayed indefinitely and there is currently no exact or estimated date for it to begin operation. Phase 2 of the express bus plan includes two additional routes: EPX (East Palo Alto to San Bruno) and an un-named route (San Mateo to downtown San Francisco); EPX was launched in 2023 after SamTrans completed acquisition of [[New Flyer Xcelsior|XE40]] battery-electric buses.<ref>{{cite report |url=https://www.samtrans.com/media/5964/download?inline |title=Award of contract for the purchase of seven battery electric buses through a Commonwealth of Virginia cooperative purchasing contract and increase the Fiscal Year 2021 capital budget by $8,802,841 for a total capital budget of $20,701,363 |author=Hansel, Derek |author2=Olmeda, David |date=June 2, 2021 |publisher=San Mateo County Transit District |access-date=13 June 2022}}</ref>