How many cars one bus takes off the road, according to federal data
How many cars one bus takes off the road is a number repeated constantly in transit marketing and news coverage, most often as 55, but the ridership and travel data the federal government itself publishes point to a different ceiling. The Federal Transit Administration counted 3,657.2 million bus passenger trips nationwide in 2024, carried by 47,326 buses running at peak service, according to an aggregation of that count published by the American Public Transportation Association. Dividing 1 total by the other, then by 365 days, puts the average United States bus at about 212 passenger trips a day, a calculation performed for this article, not a number either agency states directly. If every rider would otherwise have driven separately at the nationwide average car occupancy of 1.5 people, a figure the Department of Energy publishes from the household travel survey run by the Federal Highway Administration, that bus could stand in for around 141 car trips a day. No source checked here measures how many riders actually would have driven instead, so 141 is a ceiling under a stated assumption, not an observed total.
The all household vehicles figure is a separately stated national number the government itself reports, not a calculation averaging the other 3 bars, since the 3 vehicle types shown do not make up the whole vehicle fleet in equal shares.
Show the numbers
| Car | 1.4 |
| SUV or crossover | 1.7 |
| Van | 2.1 |
| All household vehicles | 1.5 |
A single full electric bus carries up to 56 car trips worth of riders
The New Flyer Xcelsior Charge NG, the battery electric bus model specified in a City of Winnipeg transit garage procurement document, carries up to 84 people at once when full, 40 seated and 44 standing, according to the specification table the manufacturer itself published in that document. Divided by the same 1.5 person car occupancy figure, a single full run of that bus could stand in for about 56 car trips, again a ceiling under the same assumption, not a measured count. The 60 foot articulated version carries up to 123 people, and the 35 foot version up to 72, so capacity scales with the length of the bus, not the battery underneath it.
Every value is a stated maximum the manufacturer itself publishes, seated plus standing, not a measured average trip load. The 40 foot bar is drawn in the second series color because it is the version the 56 car trip calculation in this article is built on.
Show the numbers
| 35 foot | 72 |
| 40 foot | 84 |
| 60 foot articulated | 123 |
Why the 55 cars figure is the wrong one to use here
The widely repeated claim that 1 bus takes up to 55 cars off the road lands close to the ceilings above by coincidence, not because it measures the same thing. Reading the article behind the 55 figure, rather than just the number, shows it traces to a Wanderu study of intercity motorcoaches, the kind of bus that runs between cities on a highway, not the city transit buses agencies like New Jersey Transit are buying today. That figure also assumes every car carries up to 5 passengers, a stated maximum, not the 1.5 people the Department of Energy actually measures per vehicle trip nationwide. A number is only as good as the vehicle and the assumption behind it, and the 55 cars claim carries neither one.
Agencies are already buying on this math
A 2022 announcement from New Jersey Transit put a first pilot fleet of 8 battery electric buses on routes in the Camden, New Jersey area, with a contract option for up to 75 more of the same zero emission buses, a starting point rather than a current fleet count 4 years later. Victor Carstarphen, the Mayor of Camden at the time, called the moment a milestone.
This is a huge milestone towards a zero emission fleet and a sustainable transportation system.
Victor Carstarphen, Mayor of Camden, New Jersey, speaking about the first battery electric bus pilot in Camden. Source 4.