View of the service tunnel leading into the longest tunnel on the Bhore ghats, the #25C. The service tunnel is located at the Khandala end of tunnel #25 (tunnel #2 in this map) on the main line. Note the two rails on the floor that serve as return path for the traction current from the interior of the tunnel #25C – Also note the flexible wires and the bonding strips used to connect the return current carrying rails to the mid line. Near tunnel #25 in the Bhore ghats, 2004-02-14. By Apurva (iti@vsnl.com).