Customs and habits of usa

Eating and Drinking: consumption of food and beverages is typically against transit policy for a number of reasons, but is not limited to spills, garbage left on vehicles, and increased risk of fire on subway lines using the electric third rail.
Bicycles and Baby Carriages: Many public transportation agencies permit bicycles onboard buses because of the installation of bicycle racks, typically on the front of the vehicle that extends when unfolded. On some light rail and subway cars, they may have bicycle racks installed in designated areas or an open area used for either wheelchair passengers or bicycles. Baby Carriages are permitted onboard all public transit vehicles, as long as it can be collapsed.
Cellular Telephones and Music: Basic courtesy is required when using cell phones and listening to music. Passengers should limit usage of a cellular telephone or force the call to their voicemail account, and earphones are required for all music devices.
Passenger Contact: Passengers are typically uncomfortable having conversations with other passengers that are not their friends, family, or of any personal relationship; they shall be initially wary of somebody they do not know but will let their guard down once it is clear that the person trying to converse with them has good intentions. In some cases, passengers may spontaneously assist visitors and tourists who may be unfamiliar with the public transportation system: visitors should not be afraid to ask for help especially if there is an emergency. Passengers are also uncomfortable of passengers who stare at others, thus people "minding their own business." Further, if somebody has a pair of earphones on and is listening to music or is reading something, it usually is a signal they would like some privacy: they should only be interrupted when it is absolutely necessary.
Operator Contact: Most public transportation agencies permit passengers to ask questions on destinations, or request for basic assistance to their destination. All public transit operators discourage passengers to have unnecessary conversations with the operator, particularly if he or she is already driving the vehicle.