A key component to a transportation system is a well-functioning bus system. Elements that make for a good bus system include: frequent enough service, reliability, convenience, safety (both on the bus and getting to the bus), affordability, and fits within the community context. The size and density of the community are two major factors in determining the scope of a bus system.
There is a strong case for making bus service 'free' to the entire community- a 20% efficiency can be gained just by not having to deal with tickets and fares. Perhaps a bus system should be treated like a public library: a community good that funded by all.
Clear windows, without tint, make for a pleasant ride.
Access for wheelchairs and baby strollers is a must for successful transit. A built-up curb combined with low-floor buses (and a fold down flap that the driver activates for wheelchairs) may alleviate the need for expensive hydraulic lifts.