Zero-emission transit buses: axle weight

The law accommodates the heavier curb weight of zero-emission buses while retaining phased reductions in allowable axle weight. It applies based on when a transit agency issues its procurement solicitation.

What the law does ​

• Sets a 25,000-pound curb-weight limit per axle for zero-emission transit buses solicited in 2027.
• Sets a 24,000-pound limit for buses solicited in 2028 or 2029, and a 23,000-pound limit for buses solicited in 2030 or 2031.
• Sets a 22,000-pound limit for zero-emission transit buses solicited on or after January 1, 2032.
• Preserves federal interstate weight limits and requires axles exceeding 20,000 pounds gross weight to have four load-bearing wheels.

Who it affects ​

• Publicly owned or operated transit systems and their contracted transit operators procuring zero-emission buses.
• Zero-emission transit-bus manufacturers and suppliers.