Standard scenario: not signalized priority and secondary road,
only straight-ahead traffic
Change the traffic rules and the number of lanes with the pulldown
menus
Change the size of the intersecting roads with the second menu
Change the traffic and the origin-destination relations with
the sliders
Observe that, with Rechts vor Links, traffic gets in a gridlock
unless demand is very light. Resolve it by changing the traffic
rules (right priority only makes sense for single-lane directional
roads)
In the mainroad and signalized scenarios, any remaining
ambiguities (left-turning mainroad vehicles encounter mainroad
vehicles in the
opposite drection, left turns if there are traffic lights) is
resolved by the Rechts vor Links rule
