Fundamentals of Transportation/Shockwaves/Additional Problems

Additional Questions

 * 1) What example or explanation can be given for shockwaves on freeways?
 * 2) Explain the 4 phases of traffic diagram and why each has the slope it has.
 * 3) How do microscopic and macroscopic models of traffic flow differ?
 * 4) Why does flow decrease in phase 3 of the traffic phase diagram?
 * 5) What types of events can create rolling roadblocks?
 * 6) How is speed calculated from a flow v. density diagram?
 * 7) What is a shockwave and how do you compute its speed?
 * 8) Can service rate decrease with increasing congestion?
 * 9) What factors affect the wave speed?
 * 10) What does the slope of the shockwave represent in the graph?
 * 11) Is it possible to increase the density of the queue and still have the shockwave going downstream?  What would be a an example of this?
 * 12) Why is the bottleneck QK curve projected on the mainroad QB curve to find the speed?
 * 13) What is Greenshields model, does it accurately predict traffic flow?
 * 14) What is the phase in traffic flow, after density is at its max, called?
 * 15) What happens to speed when the density  increases?
 * 16) What does the slope represent in a traffic phase diagram
 * 17) Give an example of density rising and speed dropping
 * 18) What is $$v_w$$ ?
 * 19) What does it mean when the flow rate begins to decrease in the traffic phase diagram?
 * 20) During the bottleneck phase, what happens to flow as density increases? (flow remains constant)
 * 21) How can you tell if the queue grows with or against traffic?
 * 22) Does the bottleneck always slow traffic?
 * 23) How can traffic avoid the bottleneck?
 * 24) How do incidents and rolling roadblocks affect shockwaves differently?
 * 25) How do speed, density, and flow change during the peak hour
 * 26) List  six examples where gaps are important.

/Additional Problems