diff --git a/src/main/java/com/conveyal/r5/shapefile/SpeedMatcher.java b/src/main/java/com/conveyal/r5/shapefile/SpeedMatcher.java
index d3e02922f..73c815925 100644
--- a/src/main/java/com/conveyal/r5/shapefile/SpeedMatcher.java
+++ b/src/main/java/com/conveyal/r5/shapefile/SpeedMatcher.java
@@ -6,6 +6,7 @@
 
 public class SpeedMatcher extends ShapefileMatcher {
 
+    static double KPH_PER_MPH = 1.609344;
     public SpeedMatcher (StreetLayer streets) {
         super(streets);
     }
@@ -16,7 +17,7 @@ public SpeedMatcher (StreetLayer streets) {
     @Override
     void setEdgePair (SimpleFeature feature, int attributeIndex, EdgeStore.Edge edge) {
         if (feature.getAttribute(attributeIndex) != null) {
-            double speedKph = ((Number) feature.getAttribute(attributeIndex)).doubleValue();
+            double speedKph = KPH_PER_MPH * ((Number) feature.getAttribute(attributeIndex)).doubleValue();
             edge.setSpeedKph(speedKph);
             edge.advance();
             edge.setSpeedKph(speedKph);