Road/street designers use a ‘design vehicle’ to set characteristics of the road or intersection. However, designing for comfortable use by the occasional large truck often results in overly wide roads or high-speed turns by cars, and opportunities are lost to create space for other, more frequent users such as pedestrians. A ‘checking vehicle’ (sometimes called a control vehicle) is a vehicle that only occasionally uses the road section. If the large vehicle is considered a checking vehicle designers will accept that this vehicle may need to mount kerbs or momentarily enter an adjacent (non-opposing) lane to make a turn.
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