Old Jefferson Street signals heading east. Track 4 is the Clear. MP 1.4<br /><br />https://www.acm.jhu.edu//~sthurmovik/Railpics/13-06-21a_CHICAGO_RACETRACK/BNSF_Chicago-Sub-JEFFERSON-ST-eb-SL-canti-tk4-Clear.html <br /><br />[i]Click the image below to enlarge. Click again to minimize.[/i]