On Thursday, Chennai City Police launched Synchronised Patrolling all over the city which will see monitoring of the metropolis by four-layers of patrolling. According to a senior police official, in addition to the existing “visible policing” (a network of high speed police cars being parked in all vantage points across the city with lights flashing), policemen riding motor cycles and bicycles would patrol the streets, lanes and by-lanes all over Chennai.