Geometry > Approach Geometry > Number of Approach Lanes nv

Number of Approach Lanes nv

A maximum of 4 lanes (40 ft) is permitted.

nv should not be greater than the number of entry lanes ne at the yield line. The HCM model does not use the number of approach lanes nv.

For multi-lanes, the lane width is V / nv and this should not be less than about 10 ft (3 m) although capacity can be derived for lanes as narrow as 6.5 ft (2 m).

The geometric model uses nv for checks and warnings.

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