Traffic Architect Parallel Roads: Chain & Ctrl Piece Copy

Whole chain or individual pieces?

This Ctrl behavior is specific to Parallel Road. Ctrl with Upgrade is documented to change the end nearest the cursor; do not transfer that tool’s selection rule to copying.

Build a connected partial copy

1. Decide which existing road pieces you actually want to duplicate. Pause if you want the normal eligible-build undo option.
2. Choose the Parallel Road tool and use Ctrl for a single piece rather than the entire chain.
3. Inspect the copied piece’s preview and place the intended first piece.
4. Continue piece by piece with Ctrl. Use the snap to the previous copied piece’s end so the new pieces join into one road.
5. Inspect each join and the final endpoints before continuing the simulation.

The November 1 developer reply gives this as the current workaround for a partial-chain request. It does not supply an exact distance-setting key or a two-point selection control, so neither is invented here.

Inspect crossings, bridges and ramps too

The October 3 Demo update says the parallel tool plans the whole road, cuts junctions where it crosses roads and copies bridges, tunnels and ramps. That makes the full preview important: a copied chain can affect more than a short surface segment. Check terrain level and endpoints with the bridge/tunnel guide when the copied route includes a crossing.

If it copies too much or looks disconnected

• The preview includes the whole chain: check that you are using the Ctrl piece operation rather than the normal chain operation.
• The next piece does not join: inspect the previous copied endpoint and the available snap before continuing; a near-overlap is not proof of a connection.
• The join looks boxy at different road widths: the same November 1 developer discussion treats merge visuals as a separate issue and asks for a screenshot of the exact case. A cosmetic seam alone does not establish an unusable route.
• The wrong eligible piece was built: use Ctrl+Z while paused and inspect the restored result.

For a continuing refusal, report the version, Demo/full distinction, selected source pieces and preview instead of promising that Ctrl repairs every road geometry problem.

Does full 1.1.0 add a two-point copy mode?

The November 3 full-release body was checked. It lists several road-tool and snapping changes, but does not establish that partial-chain selector. The latest explicit copying instructions reviewed here are still the November 1 whole-chain/Ctrl-piece explanation. This is the boundary of the evidence, not a claim about every future update.

The copy task is complete when only the intended chain or pieces have been duplicated, consecutive pieces join at their endpoints, and the final route reaches the roads you intended. A parallel appearance alone does not prove connectivity.