The traffic volume of a roadway is defined as the multiplication of
- ASpeed and time headway
- BSpeed and distance way
- CTraffic density and speedCorrect
- DTime headway and distance headway
Solution
Concept
Traffic Volume and Speed-Density Relationship
Formula
q = k × v
Step-by-step solution
Identify the terms in the formula q = k × v: q represents traffic volume, k represents traffic density, and v represents speed. Therefore, traffic volume is the product of traffic density and speed.
Explanation
Traffic volume (q) is defined as the total number of vehicles passing a given point per unit of time. It is calculated by multiplying traffic density (k), which is the number of vehicles per unit length of road, by space mean speed (v), which is the average speed of those vehicles.
Shortcut
Remember the formula Q = K × V, where Traffic Volume (Q) is the product of Traffic Density (K) and Speed (V). A simple mnemonic is Very Dense Volume (Volume = Density × Speed).
Common mistake
A common mistake is confusing traffic density with time or distance headway, leading students to select options involving headway rather than recognizing that traffic volume is the product of traffic density and speed (q = k × v).
Correct answer: C) Traffic density and speed