Updated: Maximum speed enhanced to 130 kmph in GQ-GD route Share Article AAA The enhanced speed limits could be achieved due to strengthening of track and infrastructure in the 1,280 km length out of 1,612 km in the Golden Quadrilateral-Golden Diagonal route. | Photo Credit: BY arrangement Maximum speed enhanced to 130 kmph in GQ-GD route South Central Railway (SCR) has achieved a landmark achievement by drastically enhancing the maximum speed to 130 kmph for 1,280 km length out of 1,612 km in Golden Quadrilateral-Golden Diagonal (GQ-GD) route, except the Vijayawada-Duvvada section, where signalling upgrade work is in progress. Enhanced speed limits could be achieved due to strengthening of track and its infrastructure by removing bottlenecks in these sections like laying of 260-metre long welded rail panels, improvement of curves and gradients. The works were done during the lockdown phase last year and the Lucknow-based Railway Designs & Standard Organisation conducted oscillation trials through Confirmatory Oscillograph Car Run consisting of instrumented coaches of all classes at 130 kmph speed during July and October 2019.