It takes 2 hrs from delhi to mathura while it takes 2 hrs from rewari to delhi..................Railway will not take the silly step...Moreover 3rd line b/w delhi-rewari has no plan in near future.......10 saal se keh rahe hai line electrified hogi par ajj tak kuch nahi hua is line par..................DELHI-REWARI is least conecntrated section which is looked by railways to add the passengers trains............