diff --git a/.gitignore b/.gitignore
index 08256880331..d4b95170ef5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,3 +29,4 @@ _site/
 /otp
 /otp-batch-analyst
 graphs/
+taggedStops.log
diff --git a/src/main/java/org/opentripplanner/graph_builder/GraphBuilder.java b/src/main/java/org/opentripplanner/graph_builder/GraphBuilder.java
index ae0b822c2b9..161c7cc7e20 100644
--- a/src/main/java/org/opentripplanner/graph_builder/GraphBuilder.java
+++ b/src/main/java/org/opentripplanner/graph_builder/GraphBuilder.java
@@ -45,6 +45,7 @@ the License, or (at your option) any later version.
 import org.opentripplanner.standalone.S3BucketConfig;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
 
 import java.io.File;
 import java.io.IOException;
@@ -109,10 +110,12 @@ public void setModes(List<RoutingRequest> modeList) {
     }
     
     public void setPath (String path) {
+        MDC.put("routerPath", path);
         graphFile = new File(path.concat("/Graph.obj"));
     }
     
     public void setPath (File path) {
+        MDC.put("routerPath", path.getPath());
         graphFile = new File(path, "Graph.obj");
     }
 
diff --git a/src/main/java/org/opentripplanner/graph_builder/module/TransitToTaggedStopsModule.java b/src/main/java/org/opentripplanner/graph_builder/module/TransitToTaggedStopsModule.java
index 0eea5ee4486..2e6fcd2f140 100644
--- a/src/main/java/org/opentripplanner/graph_builder/module/TransitToTaggedStopsModule.java
+++ b/src/main/java/org/opentripplanner/graph_builder/module/TransitToTaggedStopsModule.java
@@ -102,7 +102,7 @@ private boolean connectVertexToStop(TransitStop ts, boolean wheelchairAccessible
             if (tsv.stopCode != null && tsv.stopCode.equals(stopCode)) {
                 new StreetTransitLink(ts, tsv, wheelchairAccessible);
                 new StreetTransitLink(tsv, ts, wheelchairAccessible);
-                LOG.debug("Connected " + ts.toString() + " to " + tsv.getLabel());
+                LOG.debug("Connected " + ts.toString() + " (" + ts.getStopCode() + ") to " + tsv.getLabel() + " at " + tsv.getCoordinate().toString());
                 return true;
             }
         }
diff --git a/src/main/resources/logback.xml b/src/main/resources/logback.xml
index 9f0be95cd02..386ac61b073 100644
--- a/src/main/resources/logback.xml
+++ b/src/main/resources/logback.xml
@@ -22,6 +22,27 @@
       <level>WARN</level>
     </filter>
   </appender>
+
+  <appender name="TaggedStopsLog" class="ch.qos.logback.classic.sift.SiftingAppender">
+    <discriminator>
+      <key>routerPath</key>
+      <defaultValue>.</defaultValue>
+    </discriminator>
+    <sift>
+      <appender name="TaggedStopsLog-${routerPath}" class="ch.qos.logback.core.FileAppender">
+        <file>${routerPath}/taggedStops.log</file>
+        <append>false</append>
+        <!-- set immediateFlush to false for much higher logging throughput -->
+        <immediateFlush>false</immediateFlush>
+        <!-- encoders are assigned the type
+             ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
+        <encoder>
+          <pattern>%msg%n</pattern>
+        </encoder>
+    </appender>
+  </sift>
+</appender>
+
   <!-- Change this to debug to let more messages through. -->
   <root level="info">
     <appender-ref ref="stdout" />
@@ -54,5 +75,8 @@
   <logger name="com.sun.jersey" level="warn" />
   <!-- Suppress an inconsequential IOException that is logged at debug level. -->
   <logger name="org.glassfish.grizzly" level="info" />
+  <logger name="org.opentripplanner.graph_builder.module.TransitToTaggedStopsModule" level="debug" additivity="false">
+    <appender-ref ref="TaggedStopsLog"/>
+  </logger>
 
 </configuration>