Description
The Network Analyst Route solver performs a U-turn at a stop even when the U-turn policy is set to 'Nowhere' or 'Only At Dead Ends'.
Cause
This occurs because the routing algorithm assumes the vehicle can pull into a stop, for example, in the driveway or parking lot, and then depart the stop in either direction without it being considered a U-Turn.
Solution or Workaround
Set the CurbApproach property on the stops to constrain the direction in which the vehicle approaches and departs the stops. For example, specify that a stop has a right-hand side curb approach, which forces the vehicle to arrive at and depart from the stop with the stop on the right-hand side of the vehicle. This prevents the vehicle from turning around at the stop.
- Right-click on the network location in the Network Analyst dialog box and click the Properties command on the context menu.
- From the Properties dialog box, change the CurbApproach setting to 'Right side of vehicle' or 'Left side of vehicle'.
- Set the default CurbApproach properties on the network analysis layer by opening the Layer Properties of the route analysis layer.
- From the Layer Properties dialog box, select the Network Locations tab and change the default settings for CurbApproach.
Note:
The CurbApproach setting is only applied to new stops added to the analysis layer.