Hyderabad, July 2 -- Massive potholes and cave-ins have appeared on the Delhi-Dehradun Expressway barely two months after it was thrown open to the public, with videos of the damaged stretch going viral on social media as the first spell of monsoon rain hit the route.

The 210-km, six-lane expressway, built at a cost of over Rs 12,000 crore, was inaugurated by Prime Minister Narendra Modi on April 14. It connects Delhi to Dehradun via Baghpat, Baraut, Shamli and Saharanpur, cutting travel time between the two cities from five hours to about two-and-a-half hours.

Videos circulating online show deep potholes and what appears to be a road cave-in on the expressway following the season's first rainfall. In one clip, people at the spot can be...