Opposite-Direction-Driving

This page describes simulations which are enabled for for overtaking through the opposite-direction edge. To enable this feature, the network must contain additional information regarding the adjacency of opposite-direction edges.

Building a Network for opposite-direction-driving

The enable overtaking through the opposite direction lane, the .net.xml file must contain <neigh> elements that specify adjacency. The options for including this information are described below.

Heuristically

By setting the NETCONVERT option --opposites.guess <BOOL>, opposite edges are identified heuristically.

Explicitly

Adjacency can be declared explicitly in an .edg.xml file as described here. Explicity definitions take precedence over heuristic computation of adjacency.

Model Description

Vehicles may overtake through the opposite direction lane to improve their travel speed. The decision to perform such a maneuver is subject to additional checks in regard to

• oncoming vehicles
• the assumed duration for overtaking the leading vehicle(s)
• the presence of free space at the end of the column being overtaken (maximum look-ahead is currently fixed at 150m and overtaking may only take place if free space is found before that threshold).
• the priority of intersections that may be passed during overtaking (only straight prioritized links may be used for opposite-direction overtaking)