Turning undirected Dijkstra/A* to directed should only be a few lines. Especially in this case it's feasible to just hack in a specific check for permanently blocked stoplights and skip if true.
frikandel
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A member registered Oct 29, 2016 · View creator page →
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Your pathfinding implementation doesn't properly check whether a stoplight is never going to be green when approaching from a certain side, as demonstrated in this screenshot: https://i.imgur.com/xvqKPSY.png
