Adjust Vehicle Tracking roundabout standards: Fastest Path Calculation.
When assigning the Fastest Path Calculation parameters to the Roundabout in Vehicle Tracking in Civil 3D, when adjusted to a certain value (f.ex; 1 m) the result given shows 1.2 m. When reducing the offsets for the fastest path calculation (Island offset and Entry offset) from 1 m to 0.7 m and 0.6 m respectively, the design speed shows an increment.
Whilst the 1m offset is minimum, the standard is not saying greater than that is better. The standard is looking for the fastest path with smallest radius without being closer than 1m to the kerb line. Moving the entry path from the 1.2 m offset to the 1 m minimum increased the speed and entry path radius such that it changed from acceptable to not acceptable. It is the entry path radius that the standard is measuring. If the entry path is drawn with a greater offset than 1 m, we would need to demonstrate that entry speed has increased by using a larger offset. In nearly all cases the fastest path will be through the 1 m offset.
VT should only be drawing an offset greater than 1 m offset if it has reached the fastest speed.
