San Diego MTS bus system
The San Diego MTS bus system is a public transport bus service serving San Diego County, California. It is part of the San Diego Metropolitan Transit System. The system operates 97 bus routes in San Diego and the rest of the southern half of the county. There are 85 "MTS Bus" fixed-route services, 9 "Rapid" bus rapid transit routes, and the "MTS Access" paratransit service.
Routes are operated by private contractors and by the San Diego Transit Corporation, a subsidiary of MTS. SDTC operates 27 routes based out of downtown San Diego, Transdev operates 74 routes based out of Chula Vista and El Cajon, and operates the "MTS Access" paratransit service that are operated with mini-buses based out of Kearny Mesa.
All buses and division facilities, even those used by contractors, are owned by MTS. MTS serves San Diego proper and the surrounding East County and South Bay regions, while the North County area is served by the North County Transit District 's BREEZE bus system.
Fleet
Active fleet
| Make/Model | Build Date | Fleet numbers | Propulsion | Length | Divisions | Notes |
| Gillig Low Floor | 2013 | 801826 | CNG | Imperial Avenue | ||
| Gillig Low Floor | 2014 | 901912 | CNG | Kearny Mesa | ||
| Gillig Low Floor | 2017 | 14011410 | CNG | Kearny Mesa | Repainted into the MTS Rapid livery in 2023. | |
| Gillig Low Floor | 20202021 | 17011738 | CNG | Kearny Mesa | 17011722 are 2020 models, 17231738 are 2021 models. | |
| Gillig Low Floor | 2015 | 20012014 | CNG | South Bay | ||
| Gillig Low Floor | 2017 | 21012136 | CNG | South Bay | ||
| Gillig Low Floor | 2022 | 22012238 | CNG | South Bay | Final batch of Gillig buses delivered to MTS. | |
| Gillig Low Floor | 2013 | 23012324 | CNG | South Bay, East County | ||
| Gillig Low Floor | 20142015 | 24012438 | CNG | South Bay | 24012418 are 2014 models, 24192438 are 2015 models. | |
| Gillig Low Floor | 2021 | 26012632 | CNG | South Bay | ||
| Gillig Low Floor | 2018 | 27812787 | CNG | South Bay | Exclusively used on Route 992. | |
| Gillig Low Floor | 2021 | 27912795 | CNG | South Bay | ||
| Gillig Low Floor | 2015 | 82018213 | CNG | East County | ||
| Gillig Low Floor | 2016 | 83018338 | CNG | East County | ||
| Gillig Low Floor | 2019 | 83518356 | CNG | East County | ||
| Gillig Low Floor Plus | 2020 | 16011602 | Battery electric | Imperial Avenue | ||
| Gillig Low Floor Plus | 2021 | 16031607 | Battery electric | Imperial Avenue | ||
| ElDorado AeroLite | 2014 | 3006 | Gasoline | Copley Park | 3001-3005 transferred to NCTD in June 2024. | |
| ElDorado AeroLite | 2016 | 31013131 | CNG | Copley Park | ||
| MCI D4500CT | 2020 | 85318554 | CNG | East County | ||
| New Flyer C40LFR | 2011 | 601621 | CNG | Imperial Avenue | Currently undergoing retirement. 29232927 are 2011 models, and were originally numbered 622626. | |
| New Flyer C40LFR | 2012 | 701731 | CNG | Imperial Avenue | Currently undergoing retirement. 29232927 are 2011 models, and were originally numbered 622626. | |
| New Flyer C40LFR | 20112012 | 29012927 | CNG | South Bay | Currently undergoing retirement. 29232927 are 2011 models, and were originally numbered 622626. | |
| New Flyer XE40 | 2019 | 15011506 | Battery electric | East County, South Bay, Kearny Mesa | ||
| New Flyer XE40 | 2025 | 76017613 | Battery electric | South Bay | ||
| New Flyer XN40 | 2025 | 301338 | CNG | Imperial Avenue | ||
| New Flyer XE60 | 2023 | 75517562 | Battery electric | South Bay | Exclusively used on Rapid 227. | |
| New Flyer XN60 | 2014 | 12011218 | CNG | Imperial Avenue | ||
| New Flyer XN60 | 2015 | 13011313 | CNG | Kearny Mesa | ||
| New Flyer XN60 | 2021 | 18011826 | CNG | Imperial Avenue | ||
| New Flyer XN60 | 2023 | 19011924 | CNG | Kearny Mesa | ||
| New Flyer XN60 | 2024 | 19251929 | CNG | Kearny Mesa | ||
| New Flyer XN60 | 2017 | 74017410 | CNG | South Bay | ||
| New Flyer XN60 | 2018 | 75017517 | CNG | South Bay | ||
| StarCraft Allstar XL | 2019 | 35063508 | CNG | East County |
On Order
| Make/Model | Fleet numbers | Year | Notes |
| New Flyer XN40 | 2024–2027 | New 5 year contract with New Flyer to supply CNG & Battery Electric Buses. These will likely replace the 600-, 700-, and 2900-series C40LFR buses and the 800- and 2300-series Gillig buses. | |
| New Flyer XE40 | 2024–2027 | New 5 year contract with New Flyer to supply CNG & Battery Electric Buses. | |
| New Flyer XE60 | 2024–2027 | New 5 year contract with New Flyer to supply CNG & Battery Electric Buses. |