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Allow u-turns at merged intersections when the turn lane is explicitly tagged in OSM. This makes the infamous U-turn from Montlake to 520 WB work! The inferred signal timing isn't great, but ah well.

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This commit is contained in:
Dustin Carlino 2021-05-27 10:09:22 -07:00
parent 83bc768e28
commit 8ceaf296eb
1 changed files with 13 additions and 2 deletions
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15
map_model/src/make/turns.rs
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@ -37,8 +37,19 @@ pub fn make_all_turns(map: &Map, i: &Intersection) -> Vec<Turn> {
if i.merged {
filtered_turns.retain(|turn| {
if turn.turn_type == TurnType::UTurn {
warn!("Removing u-turn from merged intersection: {}", turn.id);
false
let src_lane = map.get_l(turn.id.src);
// U-turns at divided highways are sometimes legal (and a common movement --
// https://www.openstreetmap.org/way/361443212), so let OSM turn:lanes override.
if src_lane
.get_lane_level_turn_restrictions(map.get_r(src_lane.parent), false)
.map(|set| !set.contains(&TurnType::UTurn))
.unwrap_or(true)
{
warn!("Removing u-turn from merged intersection: {}", turn.id);
false
} else {
true
}
} else {
true
}