LST guidance puts emphasis on training and compliance

Full details of the regularised use of longer semi-trailers (LSTs), which came into effect at the end of May, have now been confirmed by the DfT.

The trailer must still comply with the current 2.4m swing radius ahead of the kingpin, and the overall combination length of 18.55m cannot be exceeded.

Maximum GCW remains at 44 tonnes on 6 axles, with one of the trailer axles needing to be steered. If the GCW exceeds 38 tonnes, an on-board weighing system must be fitted.

Operationally, any route intended to be used must have a prior route plan and risk assess- ment given to drivers. The secretary of state must be notified of the prospective use of LSTs via the O-licensing system

Other guidance includes enhanced driver training and scheduling and specific LST training for any other staff involved in their operation, including loading.

Any operators participating in the LST trial can continue under those permits before joining the new regime after a transitional period until 30 November 2023, after which time existing permits will be revoked.