Truck routing allows you to have trucks routed (where available) using truck maps which will avoid low bridges, forbidden roads etc.

Adding truck specifications ensures that regulations (where available) can be adhered to based on allowed size / specification.

Setting further data for a vehicle can be done in Vehicles ⇒ Vehicle profile ⇒ Truck specifications.

There are options of adding dimensions, weight, truck type and the number of trailers.

Click Save once all the specifications have been added.

Truck specifications can also be added for a particular vehicle type which will mean that vehicles added will automatically have these specifications applied to them when that vehicle type is selected.
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More information about vehicle types can be found in this article.