diff --git a/game/src/common/colors.rs b/game/src/common/colors.rs
index 442ef00e63..d28f192087 100644
--- a/game/src/common/colors.rs
+++ b/game/src/common/colors.rs
@@ -306,6 +306,13 @@ impl<'a> ColorNetwork<'a> {
             self.add_r(r, scale.eval((cnt as f64) / max));
         }
     }
+    // Interpolate a color for each intersection based on the max count.
+    pub fn pct_intersections(&mut self, counter: Counter<IntersectionID>, scale: &ColorScale) {
+        let max = counter.max() as f64;
+        for (i, cnt) in counter.consume() {
+            self.add_i(i, scale.eval((cnt as f64) / max));
+        }
+    }
 
     pub fn build(self, ctx: &mut EventCtx) -> (Drawable, Drawable) {
         (ctx.upload(self.unzoomed), ctx.upload(self.zoomed))
diff --git a/game/src/layer/traffic.rs b/game/src/layer/traffic.rs
index 0465a9267c..927cce1121 100644
--- a/game/src/layer/traffic.rs
+++ b/game/src/layer/traffic.rs
@@ -90,8 +90,8 @@ impl Backpressure {
         .build(ctx);
 
         let mut colorer = ColorNetwork::new(app);
-        colorer.ranked_roads(cnt_per_r, &app.cs.good_to_bad_red);
-        colorer.ranked_intersections(cnt_per_i, &app.cs.good_to_bad_red);
+        colorer.pct_roads(cnt_per_r, &app.cs.good_to_bad_red);
+        colorer.pct_intersections(cnt_per_i, &app.cs.good_to_bad_red);
         let (unzoomed, zoomed) = colorer.build(ctx);
 
         Backpressure {
@@ -211,14 +211,7 @@ impl Throughput {
             } else {
                 Widget::nothing()
             },
-            ColorLegend::gradient(
-                ctx,
-                &app.cs.good_to_bad_red,
-                vec![
-                    "0".to_string(),
-                    prettyprint_usize(road_counter.max().max(intersection_counter.max())),
-                ],
-            ),
+            ColorLegend::gradient(ctx, &app.cs.good_to_bad_red, vec!["0", "highest"]),
         ]))
         .aligned(HorizontalAlignment::Right, VerticalAlignment::Center)
         .build(ctx);