A private Bihar-registered bus, inside which a 30-year-old woman was allegedly gangraped by two men on Tuesday, had tinted windows, heavy curtains and no location tracker in violation of rules and guidelines, police said on Thursday. The bus allegedly took an 8km route in outer Delhi that crossed at least two police booths, HT found.Delhi police say bus in which a woman was gangraped violated Supreme Court norms. (Representative image/HT) (Sanchit Khanna/Hindustan Times file photo)In 2012, the Supreme Court prohibited the use of black films or any other material (such as curtains or mesh) upon safety glass, window screens and side glass of all vehicles. In 2016, the ministry of road transport and highways issued a notification mandating vehicle location tracking devices and emergency buttons in all public service vehicles. These two features were absent in the bus.Police said that the woman, a Pitampura resident, entered the bus around 12.15am at the Saraswati Vihar bus stand, which is about 700 metres from an integrated police booth of the Rani Bagh police station. Moving on the Outer Ring Road, the bus allegedly passed by the Raj Park police booth and reached the Peeragarhi junction, where another police booth was situated.When HT travelled along the alleged route taken by the bus – according to the police – five police officers were present at the junction.Police said that from the junction, the bus allegedly took the Delhi-Rohtak Road towards the Nangloi railway station and was eventually parked nearby. The alleged route had several CCTV cameras.“Thousands of vehicles take that route and the officials present on the route did not hear anyone screaming or asking for help,” said a senior police officer.Police said both accused, Umesh Kumar and Ramendra Kumar, had valid permits obtained by the company for operating interstate buses.