1. The Nagpur-Mumbai Expressway seen a major hole on the Amravati-Lohegaon flyover just 14 months. 2. Engineers forgot to connect two flyovers at Gokhale Bridge in Mumbai 3. The Pragati Maidan tunnel in Delhi developed cracks and leaks in just 20 months. 4. Massive landslides in Himachal Pradesh and Uttarakhand because the NHAI didn’t have any experience in building mountain roads.