also it is important not to speak loudly and attract undue attention, to prevent robberies when leaving the bus - photography on board of buses is permitted, however it should be avoided, as it could disturb and irritate other passengers. unfortunately, assaults can happen on board of buses, even though most are equipped with security cameras - as robberies are usually non-violent, in case of problems it is always best to simply comply with the requests and hand over whatever belongings are in one's possessions - usually cell phones and electronic devices. the portal 1746 is a government service that can be reached through the official website, by the official app, or by calling the number itself (1746) - any inconveniences with the municipality of rio, with particular emphasis on mishaps involving traffic, including but not limited to buses, taxis, and vans.