Geometry > Exit Geometry > Exit Road Width Vx and Lanes nvx

Exit Road Width Vx and Lanes nvx

Vx is the exit road width after any exit taper has ceased. It excludes the gutter pan and has a range from 10 ft (3 m) to 40 ft (12 m).

Vx is used to check and warn if the exit road has insufficient capacity to accommodate the exiting traffic from the roundabout (and bypass). Default exit road capacities are provided (varying according to the Environment selected). Default values can be replaced with local values in the Calibration data tables.

The number of exit lanes nvx is after all exit taper has finished. Its range is 1 – lanes

It is used to check for geometric consistency.

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