What is the maximum permitted length of a dual axle bus?

1. There is no length restriction, but the length of its rear extension should not exceed 3.5 meters.
2. 13 meters; and for an articulated bus – 18 meters.
3. 15.5 meters; and for an articulated bus – 18.75 meters.
4. Correct answer: 13.5 meters.

WhyA two-axle bus may be no longer than 13.5 m. 15 m is for a three-axle bus, 18.75 m for an articulated one.