Answers to practice exam.  If you have questions about where these numbers came from, send me an email.

Problem 1
	1. Surface course, base, subbase, subgrade
	2. Every used route connecting an origin and destination has equal and minimal travel time.  Route choice.
	3. Self-driving cars are technologically feasible and can improve safety and congestion.  However, liability concerns will make them very difficult to introduce.  
	
Problem 2
	1. 94101
	2. 6250
	3. 10

Problem 3
	1. 50 mi/hr
	2. 0.098
	3. 948 ft (Sorry, there was an error in this problem... you should not assume that the curve length is shorter than the stopping distance.  If you solved it using this wrong assumption, you would get 1430 ft)
	4. 41 mph, Malone was traveling too fast (If you used 1430 ft as SSD you would get 51 mph and conclude something else happened!)
	
Problem 4
	1. 400 pci
	2. No