Words and Terms
Transportation is the movement of people and _____.
What are "goods"?
What is the average headway?
The K factor is the ratio of this to the daily traffic volume.
What is the peak hour volume?
This geographic area tries to keep land uses together, and shouldn't span large roads.
What is a traffic analysis zone (TAZ)?
Transportation is a balance between accessibility and this quality.
What is mobility?
The idea that people use transportation systems for a reason.
What is "derived demand"?
What is "jam density"
This kind of counting categorizes the mix of vehicles on a roadway.
What is classification?
This is the base free flow speed for freeway segments, when you don't have something else measured.
What is 75.4 miles per hour
General Motors did this to American streetcars.
What is killed them?
This is the second step of the four-step travel demand forecasting process
What is Trip Distribution?
This factor accounts for varying flow rates across a study period.
What is the "peak hour factor"?
It's like density, but for time
What is occupancy?
Having a lateral clearance of less than 12 feet does this to the free-flow speed
What is lower it?
Vehicles per hour are typical units of what concept?
What is Traffic Flow?
This is a person or organization who will be affected by a transportation policy.
What is a stakeholder?
The average speed at which vehicles traverse a segment of roadway.
What is space mean speed?
In Greenshield's model, this is (Vf Kj) / 4
What is the capacity / maximum flow rate?
Having a high share of heavy vehicles does this to the free flow speed.
What is nothing at all?
Level-of-service is a measure of this.
What are roadway performance and conditions?
When people choose a transportation mode, they try and maximize this quantity
What is "Utility"?
The average speed at which vehicles pass a point on the roadway.
What is time mean speed?
In Poisson's model, this is the meaning of lambda
What is the average event rate?
If the demand volume is above this point, you need to calculate a congested speed.
What is the break point?
This manual provides useful advice, but should not be taken as literal TRUTH when estimating transportation demand.
What is the ITE Trip Generation Manual?