abstreet/docs/design/lanechanging.md

# Lane-changing

Ah, this bundle of joy.

Steps:
- query to know when is it safe (similar to spawn checking)
- the state to execute it (and assert it completes in time)
- the modifications to lookahead
- change pathfinding to understand new movements
	- how many LCs can be done on one road?
	- how to render it?
- decide if LCing can ever fail (or if cars will just stop and wait to merge)
- change what turns are initially created
make the large maps still work: fixes to bus route verification and degenerate stop sign handling 2018-11-06 23:13:33 +03:00			`# Lane-changing`

			`Ah, this bundle of joy.`
draw turn restrictions when relevant. needs tuning later 2018-11-07 00:50:41 +03:00
			`Steps:`
			`- query to know when is it safe (similar to spawn checking)`
			`- the state to execute it (and assert it completes in time)`
			`- the modifications to lookahead`
			`- change pathfinding to understand new movements`
			`- how many LCs can be done on one road?`
			`- how to render it?`
			`- decide if LCing can ever fail (or if cars will just stop and wait to merge)`
			`- change what turns are initially created`