Buses, coaches, minibuses and taxis will be checked in South Yorkshire in a month-long scheme focusing on school transportation.
Officers across the county will be taking part in Operation Coachman, a nationwide initiative run by the Association of Chief Police Officers.
It aims to ensure that vehicles carrying schoolchildren are roadworthy.
Sergeant Andy Whittaker said: “The safety of the vehicles carrying our region’s children to their places of education is incredibly important.
“Police and other agencies will be conducting high visibility patrols and checking as many passenger carrying vehicles as possible in the coming month to make sure that these vehicles are roadworthy.
“We will be conducting a thorough examination, looking at everything.”