The reason behind ERS DURONTO taking more time than RAJDHANI express is its time scheduling,
*TVC Rajdhani departs from ernakulam just 1 hour before ERS-NZM DURONTO departs so ERS duronto cannot be allowed to run at a high speed even though duronto is said to be faster than rajdhani.
*And as the ERS duronto departs on tuesday it is one of the most traffic congested day in konkan railway in a week and it is a single line so it takes more time waiting in loop lines for allowing other trains to cross...
more... and plus the time taken at technical stops, which results in more travel time.