1

Question 1

scats

Answer 1

nz coordinated signal control

Question 2

types of vehicle detectors

Answer 2

inductance loop detectors
GPS
video image processors
microwave sensors

Question 3

VIP

Answer 3

video image processors
detect speed, occupancy, count, presence
shadows, weather and surfacing and can fuck with it

Question 4

RTMS

Answer 4

remote traffic microwave sensors
detect speed, count, presence
shadows and weather dont matter cuh

Question 5

infrared sensors

Answer 5

detect changes in temp due to vehicle

detect presence, occupancy and count

Question 6

free flow condition

Answer 6

speed of vehicle if not influenced by other vehicles

Question 7

applications of speed studies

Answer 7

Traffic operation and control:
-establish max and min speeds
-safe speeds at curves
-proper location of traffic signs 
-no passing zone lengths
-school zone protection
Accident analysis
Before and after studies
Geometric design
Research studies

Question 8

How to control speed

Answer 8

speed signs
road humps
narrower roads (possibly with vegetation)
roadside parking

Question 9

most common method of recording speed

Answer 9

Axle detectors (pneumatic tubes)
inductance loops
radar gun

Question 10

errors wrt radar gun

Answer 10

Tool errors
angle correction factor
rounding error
On site errors
cars slowing when they see you
being safe

Question 11

critical speed

Answer 11

85% percentile

maximum speed limit

Question 12

15% percentile speed

Answer 12

minimum speed limit

speeds below this obstruct traffic flow

Question 13

travel time

Answer 13

total time including stops and delays (operational delays only) to travel from one point to another

Question 14

delay

Answer 14

difference between actual travel time and travel time with no impedances

Question 15

stopped delay

Answer 15

delay when not moving (traffic lights, stop signs, roundabouts, railway crossings) (fixed delay)

Question 16

geometric delay

Answer 16

delay while negotiating islands and roundabouts etc. (fixed delay)

Question 17

operational delay

Answer 17

delay due to other vehicles
causes of operational delay:
-traffic movement interfere with main stream flow (side frictions)
-congestion due to high volume (internal frictions)

Question 18

PHF

Answer 18

peak hour factor

Question 19

DHV

Answer 19

design hour volume