Vape Blu by Juul advertisement on London Bus Stock Photo Alamy You absolutely are not allowed to smoke or vape on the bus or on any public transport for that matter. Yes its a criminal offence to smoke on a bus public transport. No first warning, youre off Back to school vape detection systems, bus overcrowding & budget woes Man spotted 'happily vaping' on bus from Tampines to Woodlands, Singapore News AsiaOne We're making it clear vaping and smoking is not permitted on our buses, trams and trains.