From d4dea94c3f900df83344eca082c6cb7e7649d87c Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Sat, 24 Oct 2020 23:37:47 +0100
Subject: [PATCH] Don't check road ahead when overtaking on one-way roads

---
 src/roadveh_cmd.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/roadveh_cmd.cpp b/src/roadveh_cmd.cpp
index 596cc4af6e..5a969b560d 100644
--- a/src/roadveh_cmd.cpp
+++ b/src/roadveh_cmd.cpp
@@ -964,6 +964,10 @@ static void RoadVehCheckOvertake(RoadVehicle *v, RoadVehicle *u)
 			if (entry->GetOccupied() < opposite_entry->GetOccupied()) return;
 			break;
 		}
+		if (check_tile != v->tile && IsNormalRoadTile(check_tile) && GetDisallowedRoadDirections(check_tile) != DRD_NONE) {
+			/* one-way road, don't worry about other vehicles */
+			continue;
+		}
 		if (CheckRoadBlockedForOvertaking(&od)) return;
 	}
 	tile_count = v->gcache.cached_total_length / TILE_SIZE;