Priority Intersection

A priority intersection is an intersection that is not controlled by traffic lights. At a priority intersection, vehicles will continue through if there are no other vehicles inside the intersection. Otherwise, they will stop and wait for other vehicles to pass.

For a priority intersection to work it needs to have at least 3 roads (a 2-road intersection is a straight road) and there is no maximum number of roads for an intersection.

Usually, an intersection looks like this:

As you can see from those red waypoints, the roads are not connected, so you should connect the roads as you see fit. Check the Connect Roadssection.

I will connect the roads like this but you can do it in any way you want.

After all roads are connected, create a priority intersection.

Go to Settings Window -> Intersection Setup

If Show All Intersections is checked you will see the intersections from the entire scene. If unchecked, only the intersections visible in the scene view will be displayed. Using the View, Edit, and Delete buttons you can perform the respective operations on each intersection from that list.

Press Create Priority Intersection to create a new intersection. This will open the Priority Intersection Setup Window.

Hide Waypoints - will hide the scene waypoints offering you the possibility to select different objects inside the scene.

For each road that enters the intersection, you'll have to press Add Road and then Assign Road Waypoints.

Select the waypoints where you want cars to stop. Selected waypoints will be marked with red circles.

When the selection is finished, press the Done button.

Do this for all roads in your intersection.

You can add more waypoints to any road by using the Assign Road Waypoints button.

You can delete a waypoint or the entire road by using the Delete button.

Using the View buttons, you can focus the scene view on the selected waypoint.

Adding exit waypoints is mandatory.

Press Add Exit Waypoints and select all the waypoints through which cars can exit the intersection. Exit waypoints are marked with green circles.

Attention! If a vehicle can exit from an intersection without passing an exit waypoint (you miss assigning an exit) the intersection will stop working thinking a vehicle is still inside the intersection and will not allow others to enter.

Check this video for more information.