More than 100 footover bridges (FOBs) along Mumbai's busiest suburban railway lines — Central and Western — fall in the top three fatal zones which require urgent attention, an internal Railways survey shows.

The list of dangerous bridges collated by the Railways shows that there are 61 bridges on the Central Railways (CR) and 42 bridges on the Western Railways that require urgent repair, DNA reported.

The East Central Railway zone with 63 bridges that need repairs are the most fatal zones. The report said that one of the bridges in the Lucknow Division, under the Northern Railway, is in a precarious condition and needs to be immediately rebuilt.

Western Railway officials did not confirm if the Elphinstone Road FOB was a part of the list. On September 29, 23 passengers were killed and 36 were injured in a deadly rush-hour stampede that occurred on a narrow foot overbridge connecting the Elphinstone Road railway station to Parel station.

The report stated that the Railway Board had issued a letter to 16 zones on Indian Railways where they had identified 275 railway bridges that need to be built immediately on September 21, a week before the stampede.

In 2017-18, the railways plan to come together to rehabilitate 114 bridges, of which CR will rebuild 20 bridges and WR will rebuild 13 bridges.

''It seems that proper time-bound planning has not been done by the railways for rehabilitation of these bridges. This creates a doubt whether the correct rating, appropriate to the actual condition, of the bridge, has been assigned or not," states the letter.

Earlier, the Union Railway Minister Piyush Goyal had called for innovation in making the railways safer while stressing that enough money is available for the purpose.

"The railway minister has asked the zones not to worry about funds as far as work on safety is concerned. And so work on rehabilitating and rebuilding these railway bridges will be expedited," AK Saxena, Director General (PR), Railway Board said.

The letter also stated that the field officers in charge of maintaining and studying the health of railway bridges need to be educated by the Chief Bridge Engineers so that the officer can determine the correct condition of bridges and take necessary remedial measures for safe movement of trains.