1 what does the term level of service los represent which

Question

1. What does the term "Level of service (LOS)" represent? Which level of service represents Free Flow Speed?

Which level of service represents breakdown in vehicular flow?

(b) Using figure 6.2 in the text, for vehicles traveling at 60mph and flow rate of 2000 vph what is the level-of-service experienced?

(c) What is the expected capacity for a free-flow speed of 60mph?

2. Find the analysis flow rate v (p).See text Chapter 6.

(a) For a Peak hour factor of 0.8, number of lanes N=4. Assume f_hv=0.9, and f_p=1

(b) For Peak hour factor of 0.7, N=3, Assume f_hv=0.8, and f_p=1

(3) Short answer questions (2 sentences maximum each part). (See Research)

(a) Write the equation that relates congestion price to travel time.

(b) Write the formula for price elasticity. What is the difference between Short-Run 

Elasticity (SRE) and Long-Run Elasticity? (LRE)

(c) Explain four common congestion pricing strategies in use.

(d) On an HOT lane what time(s) of day would you expect to have the maximum demand?

(ii) What is meant by VOT? What is "free flow speed" for a multi-lane highway? (Give a 10mph range)

4. Spell out what each of the following transportation acronym means:

(a) AASHTO

(b) AADT

(c) TRD

(d) PHF

(e) PCE

(f) PTSF

5.Please select True or False

(i) The speed at Jam Density Is zero. (T/F)

(ii) For basic traffic flow equations, the relationship between speed and Flow is assumed to be Linear.(T/F)

(iii) Greenshields speed-density model Is a parabolic function(T/F)

(iv) Density at capacity is equal to one-half of Jam density.(T/F)

(v) Flow -density relationship can be described as a parabola(T/F)

6. State the four steps in the traditional travel demand forecasting process.

(b) Describe what is meant by "Mode Choice"

(c) Describe what is meant by "Temporal Trip Aggregation"

(d) Write the equation for a typical trip generation model

7. State Wardrop's principle of User Equilibrium.

Two routes connect a city and a suburb. During peak hour the travel times on both routes are given by the following equations:

Route 1:

  T1= 6+3x1      

  T₂ = 4 +9x₂

The total flow   x₁ + x₂ =4.

Time T₁ and  T₂ are in hours. Find the equilibrium flow (x₁ and x₂) and also the equilibrium travel time