1. Transportation System Issues and Challenges
Traffic Congestion
Traffic Safety
Equality of Access
Environmental Impacts

2. Traffic Congestion Demand & Supply; Trip Generation;
Construct more capacity V.S. Transportation Management; (Funding Limitation.)
ITS
Traffic Control (e.g. Improved timing and coordination of urban arterial signal systems or freeway ramp meters.)

3. Traffic Safety
Motor vehicle fatality (most but decreasing because of improved highway design and maintenance, improved vehicle design, driver education and law enforcement activities.)
Speeding
Adverse Weather
Aviation fatality (very low compared to those for motor vehicles)
Rail traffic (sporadic)

4. Equality of Access
The poor, the elderly and the physically handicapped.
Keep fares low
Public transportation systems (includes airports, rail transit stations and intersections of streets with sidewalks) must be fully accessible to both wheelchair users and pedestrians.

5. Environmental Impacts
Air quality (vehicle technology and vehicle maintenance -- emissions control devices and inspection programs)
Energy consumption (improve vehicle technologies, new fuels)
Land use
Site-specific impacts
displacement of residents and businesses due to construction of transportation facilities
noise
impacts on wild-life
impacts on water quality
visual impacts
temporary impacts during construction (noise, dust, reduced water quality due to erosion of unprotected slopes, etc.)