New Delhi, Jan. 24 -- Heavy rainfall combined with security rehearsals for the Republic Day parade triggered severe traffic congestion across the national capital and its borders on Friday, leaving commuters, students and ambulances stranded in gridlocks lasting several hours. Significant traffic jams were reported around Connaught Place, ITO, Kamla Market, Patel Nagar, Dhaula Kuan, Outer Ring Road, Sarai Kale Khan, Sarita Vihar, Burari, and the Delhi-Gurugram and Mayur Vihar-Noida routes. Senior police officers said significant number of personnel were deployed for Republic Day arrangements, with barricading erected in central and New Delhi for rehearsals. Delhi Traffic Police also issued an advisory on Friday for traffic restrictions around Connaught Place, Janpath, Rafi Marg, Man Singh Road, Kartavya Path due to Republic Day parade rehearsals....