In 2008 Boston mandated that its entire taxi fleet must be converted to hybrids by 2015.

It would soon dominate fleet sales to police departments and taxi fleets.

Most new drivers work for one of 29 taxi fleets.

Executives of the city's largest taxi fleets could not be reached for comment last night.

Bamako in particular is known for its green and yellow taxi fleet.

But Macao's taxi fleet has not kept up with the rapid growth in tourism.

Over the years, many medallions once owned by individual drivers were sold to large taxi fleets.

It is a 4-door sedan especially designed for use in taxi fleets.

By the end of the decade, if all goes according to plan, the taxi fleet will be Beetle-free.

The environmental impact of the taxi fleet is enormous.