Note: The Lane Taper Ratio controls are only available for effective lane width approach legs (see Effective Lane Widths)

Specify the position of the approach leg's entry/exit lane side relative to the reference element clockwise or counterclockwise. This option is useful if you need to match the roundabout design with the last curve of an S-shaped leg entry/exit. For example, if the counterclockwise 1:8 entry lane taper ratio is applied, the approach leg's entry lane side will taper at 1 unit to the right for every 8 units towards the reference element. If the clockwise 1:8 entry lane taper ratio is applied, the approach leg's entry lane side will taper at 1 unit to the left for every 8 units towards the reference element.

Configure Lane Taper Dialog Box

Entry / Exit Lane Taper Ratio

Specify a lane taper ratio value.

CW

Clockwise from the reference element.

CCW

Counterclockwise from the reference element.