OLD BRIDGES /NEW BRIDGES that doesn't matter as long as the PWAY has been certified for 130KMPH ops. TSR,s do come up whenever track work is going on. Just FYI Naini bridge is fit for 130KMPH ops. There is only a small section Gurpa-Gujhani Ghat section which has 75kmph ops . Rest full track from Ghaziabad to Dankuni is fit for 130KMPH ops.