Residents of Sanangkuppam in Ambur town picketed the officials of the National Highways (NH)- 46 in Ambur on Thursday, demanding an underpass at the Sanangkuppam and NH Junction. The local public picketed Project director of NH, Parvadesam’s vehicle and blocked the road. They said Sanangkuppam residents faced difficulty in getting across the road. After assurance of action, they dispersed.