1. III. Transportation

2. A. Importance 1. The design should mix convenience and variety a. Relying on single sources will cause too much congestion 1. traffic costs nation 74 billion dollars per year

3. 2. Roads handle cars and buses a. One bus can keep 250 cars off the road b. Must be established and maintained 1. Each state spends an average of 8 billion dollars per year on maintenance of roads with counties chipping in more 2. Building more roads in even more expensive c. Accidents cost money in injuries, prevention, and removal

6. 3. Rails include trains, subways, and els a. If used, keep 1,000’s of cars off road b. Not feasible in all areas 1. populations too small or remote to cover high initial cost c. Maintenance is significantly less expensive d. Accidents are rare but more serious when do occur