Track Maintenance and Engineering Instructions - Metrolink

13.4 METHOD OF CONSTRUCTIONA. Construction of new crossings and reconstruction of existing crossingsshall conform to E.S. 2006 and 2011.B. Work on highway crossings, public streets, and roads shall be done withthe least possible inconvenience to vehicular and pedestrian traffic. Careshall be taken to protect the public in compliance with safety andapplicable statutes. Closing of traffic lanes shall only be done afterpermission is obtained from the governing roadway agency.C. Highway approach grade shall not be increased as a result of rebuilding orresurfacing track through highway crossings, unless approved by theManager, Track and Structures Maintenance.D. A full road closure shall be sought from the responsible public agency forcrossing renewals. Crossing shall not be renewed half at a time, except ifimpossible to obtain a full closure, and then only if so authorized by theManager, Track and Structures Maintenance.E. Traffic control devices shall be in place according to the approved trafficcontrol plan.F. In placing and removing barricades, workmen shall place the barricadeclosest to the edge of the roadway first and work out, wherever possible.In removing barricades, the outer most barricades shall be removed firstand work toward the edge of the roadway removing the remainingbarricades, wherever possible.G. The following guidelines should be followed when renewing a gradecrossing.1. Replace fouled ballast to a depth of 15 inches below bottom ofcross ties.2. Place a 6 inch minimum layer of compacted hot mixed asphalt to alength of 10 foot either side of crossing along the track.3. Place suitable ditch, install drain and signal conduits or pipes asrequired.4. Replace rail and OTM as needed. Replace all ties. Extendreconstruction at least 40 feet beyond ends of crossing materialalong the track.5. Replace crossing surface material.SCRRA ENGINEERING INSTRUCTIONS 135 of 160 Revision Issue: 2-12-09