The traffic police top cop’s brainchild to collect data of all vehicles in Mumbai faced a major set back yesterday evening, when a traffic constable was brutally assaulted by a biker who did not wish to give his personal details for the data collection. The biker picked up a hard wooden stick from a petrol pump and hit the constable on his head. He was later arrested while the cop has been admitted at Lilavati hospital in a critical condition.

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