The proposed Delhi-Dehradun expressway will curtail the travel time between the two cities from nearly 6 hours now to only 2.5 hours, the Centre said on Thursday. The road is designed for driving at a minimum speed of 100 kilometre per hour. The motorway will have an elevated 12-kilometer stretch to enable unhindered movement of animals. It will be Asia's largest such wildlife corridor. The Centre, in a statement, said the road will cut the travel distance between Delhi and Dehradun by 25 kilometres. The expressway will take approximately two years to be operational.