Modular B-triples are constructed from a prime mover having a single steer axle and a tandem drive axle group towing three triaxle semi-trailers all connected by fifth-wheel couplings. The B-triple is a straightforward extension of the B-double, obtained by the addition of another lead trailer.
Creating a national framework for modular B-triples
In May 2012, ministers approved the NTC’s final policy paper and agreed to the adoption of a single national modular B-triple vehicle specification which will enable modular B-triples to have access to the current road train network on the same basis as double (type one) road trains.
Find out more
The NTC has concluded this project. Contact the National Heavy Vehicle Regulator to find out more about B-triple access.