PRAYAGRAJ, July 11 -- The Regional Transport Office (RTO) has launched a special enforcement drive against school vehicles violating safety rules after schools reopened in the city. Transport officials said the campaign was carried out in both urban and rural areas. During the drive, authorities suspended four drivers' licences, removed 15 school vehicles from service and issued challans to more than 50 vehicles for violating transport rules. Assistant regional transport officer (enforcement) Anand Rao said several school vehicles were operating without valid fitness certificates or permits. Some were also carrying more children than the approved seating capacity. He said action was taken to ensure the safety of schoolchildren and to prevent such violations in future. During the drive, enforcement teams stopped a college bus near the Allahabad High Court. The bus was more than 15 years old and was operating with an expired permit while carrying students....