Quick Start: Build a T-Junction with the Intersection Tool

This is part 3 of the Quick Start. Here you build the same kind of T-junction as part 2, but let the Intersection Tool (Pro) wire it for you — it creates the junction splines and connects all the lanes automatically.

Quick Start series: 1. Create a Road → 2. Build a T-Junction Manually → 3. Build a T-Junction with the Intersection Tool (you are here)

Note

Prerequisite: the Intersection Tool is a Pro feature.

How the tool thinks

The Intersection Tool joins road ends — it connects the endpoints of the roads you pick into one junction. So for a T-junction you provide three road arms whose ends meet at the junction point (the two halves of the main road plus the branch), and let the tool stitch them.

1. Draw the three arms

Using the Spline tile in the Create palette (Draw Spline Tool), draw the three road arms so their ends come together at the junction point:

  • the two halves of the main road (left arm and right arm), and

  • the branch (the stem of the “T”).

The arms may be in any actors — the tool doesn’t require them to share one, unlike the manual method.

2. Run the Intersection Tool

Activate the Intersection tile in the Create palette, then click the end of each arm that should join the junction. Selected endpoints are highlighted.

3. Let it build the junction

Once all three ends are selected, the tool creates a new actor containing the connecting junction splines and wires up all the URoadConnection / ULaneConnection links automatically — no manual connecting in Spline Mode needed.

Optionally set turn directions (straight / left / right / U-turn) per entering lane; these drive lane connectivity and AI navigation. See Intersection Tool → Turn Directions.

4. Bake

Open the Bake palette → Bake Selected on the junction actor to generate its mesh. The junction actor’s splines already share one actor and group, so it bakes as a single seamless mesh. See Baking.

Note

Bake the junction actor separately from the approach-road actors — each is its own generation unit (Spline grouping).

Where to go next