Compressed Natural Gas (CNG) Buses

Our current bus fleet includes 246 40-foot CNG buses (about 20 per cent of our total bus fleet) and we expect to operate about 399 CNG units by 2027.

When compared to diesel buses, our CNG-powered buses emit around 20 per cent less greenhouse gas (GHG) emissions, up to 95 per cent less nitrogen oxides, and almost no particulate matter.

Since their introduction in 2014 our CNG buses have helped us reduce our total bus fleet CO2 emissions by approximately 5,650,000 kilograms. (That’s the CO2 emissions equivalent to consuming about 2.4 million litres of gasoline).

Our CNG buses also have lower fuel and maintenance costs compared to our diesel buses.

We store and keep our CNG buses at our 44,300-square-metre Stoney Transit Facility, the largest indoor CNG fueling complex in North America and one of the largest in the world. The facility is capable of housing about 470 40-foot CNG buses.

We plan to buy up to 153 more CNG buses through 2026 to replace diesel buses due for replacement. By 2027, we expect CNG buses to make up about half of our 40-foot bus fleet, fully using our Stoney Transit Facility. CNG buses fit with our diversified fleet strategy, which is guiding our fleet transition to low- or zero-emission buses in support of The City’s operational emission reduction goals.