From 9be94f9a704c1fae45a62a0c581089eb12ceb176 Mon Sep 17 00:00:00 2001
From: Dustin Carlino <dabreegster@gmail.com>
Date: Mon, 20 Jul 2020 10:38:56 -0700
Subject: [PATCH] don't spawn bikes on tiny lanes, it causes queue spillover

---
 sim/src/lib.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sim/src/lib.rs b/sim/src/lib.rs
index 3ade018095..b4455da512 100644
--- a/sim/src/lib.rs
+++ b/sim/src/lib.rs
@@ -440,9 +440,19 @@ impl SidewalkSpot {
         // Don't start biking on a blackhole!
         // TODO Maybe compute a separate blackhole graph that includes bike lanes.
         if let Some(redirect) = map.get_l(driving_lane).parking_blackhole {
+            // Make sure the driving lane is at least long enough to spawn on. Bikes spawn in the
+            // middle, so it needs to be double.
+            if map.get_l(redirect).length() < 2.0 * BIKE_LENGTH {
+                return None;
+            }
+
             let new_sidewalk = map.get_parent(redirect).bike_to_sidewalk(redirect)?;
             SidewalkSpot::bike_rack(new_sidewalk, map)
         } else {
+            if map.get_l(driving_lane).length() < 2.0 * BIKE_LENGTH {
+                return None;
+            }
+
             SidewalkSpot::bike_rack(sidewalk, map)
         }
     }