Junctions & signals
Traffic Architect Junction & Signal Guides
Choose Traffic Architect help for allowed turns, traffic-light timings and phases, or interchange placement. Check the tool and version before editing.
Which part of the junction needs changing?
To prevent a movement, use junction turn bans. To choose a specific outgoing lane, use the lane-connector guide. To change green time or investigate a phase reset, use the versioned signal guide. For a prebuilt road arrangement, check interchange placement and generated turn rules.
These change different layers of the same junction. If a movement edit leaves a destination inaccessible, follow the No Route Available checks instead of assuming the physical road disappeared.
Find your next guide
What are you working on?
Junctions & signals
- Ban left turns & U-turnsChange permitted movements, not road geometry; check what Apply, Cancel and Reset affect.
- Signal timing & phasesCheck which setting changed and whether its reported reset belongs to your build.
- Place an interchangeCheck the layout, road class, preview and movement rules after the interchange is placed.
- Connect incoming & outgoing lanesChoose which outgoing lane an incoming lane can reach, then check the committed result.