CHAPTER 4 TRACKWORK 4.1 SCOPE 4.2 TRACK 4.2.1 General 4.2.2 Trackbed 4.2.3 Track mponents 4.3 MISCELLANEOUS 4.3.1 Walkway 4.3.2 Buffer Stops 4.3.3 Cable Troughs 4.3.4 Reference Points and Distance Indicators 4.3.5 Cross Bonding and Rail Bonding cables 4.3.6 Bonded Insulated Rail Joint 4.3.7 Rail Welding 4.3.8 Track Insulation