Nalgonda: Thousands of travellers on National Highway 65 faced severe traffic congestion for hours while heading to their hometowns in Andhra Pradesh to celebrate the Sankranti festival. Gullanki Murali, who left Banjara Hills in Hyderabad at 5 am on Sunday, reported taking over four hours to reach the Panthangi toll plaza due to the gridlock. Another commuter, Singam Sai Kumar, …