Delhi Traffic Police Raps 'Tera Time Aayega' for road safety. Sandeep Shahi, a head constable in Delhi traffic police, has mastered the art of rapping and he is using it to promote road safety in the national capital.Mr Shahi has other ways too to persuade motorists to abide by the traffic rules. Sometimes, he uses a mirror to make them feel guilty. The cop also buys helmets using his own money and gifts it to others.