DPWH MANUAL (TRAFFIC FLOWS & CONTROLS)

Question 1

It is defined as the maximum number of vehicles, passengers, or the like, per unit time, which can be accommodated under given conditions with a reasonable expectation of occurrence.

Answer 1

Capacity

Question 2

It is defined as the number of vehicles per unit distance occupying a section of roadway at a given instant in time.

Answer 2

Density

Question 3

It is the maximum number of vehicles, passengers, or the like, which can be accommodated by a given facility or system under given conditions at a given level of service. It is the number of vehicles counted in a specified time interval.

Answer 3

Volume

Question 4

It is defined as the number of vehicles per unit time passing a point in space, and is usually expressed in vehicles per hour.

Answer 4

Flow

Question 5

Describe the motion of individual vehicles and their interactions with one another. Also, describe the relationships among speed, flow, and density.

Answer 5

Microscopic Models

Question 6

They are measured between common points on successive vehicles.

Answer 6

Time Gaps

Question 7

It is defined as the fraction of time that vehicles are present at a point in space.

Answer 7

Occupancy

Question 8

Traffic signals operate by assigning the right of way successively to intersections approaches. The red, yellow or green light that is displayed to drivers in a given movement is called?

Answer 8

Indications

Question 9

The time required for one complete sequence of signal indications is called?

Answer 9

Cycle

Question 10

The discrete portion of a cycle during which the indications do not change is called?

Answer 10

Interval

Question 11

The portion of the cycle during which movements with the right of way do not change is called?

Answer 11

Phase

Question 12

The speed of which vehicles are presumed to travel through the coordinated signal system is known as?

Answer 12

Speed of progression

Question 13

The space-time path interesting the green at all signals is called?

Answer 13

Through band

Question 14

The time difference between the beginning and end of the through band at any point is called?

Answer 14

Band width

Question 15

The time difference between the beginnings of the greens at any two signals is known as the?

Answer 15

Offset of the cycle

Question 16

In this system, each signal displays the phase opposite that of the adjacent signals; thus, the pattern, looking down the street at any instant of time, is red-green-red-green.

Answer 16

Single Alternate System

Question 17

In this system, phases at two intersections are grouped together, so that the pattern is red-red- green-green-red-red.

Answer 17

Double Alternate System

Question 18

It groups three intersections and produce a pattern of red-red-red- green-green-green.

Answer 18

Triple Alternate System

Question 19

Employing minimum cycles are usually sufficient for platoon-breakup metering.

Answer 19

Fixed-Time Systems

Question 20

May respond to volumes measured upstream of the ramp, occupancies measured upstream of the ramp, occupancies measured downstream of the ramp, or some combinations of these.

Answer 20

Traffic-Responsive Systems

Question 21

Real time freeway management and control functions are often carried out by organizations known as?

Answer 21

Transportation Management Center

Question 22

Intended to reduce congestion and queuing delays on freeways, provide for rapid response to capacity reducing incidents and inform drivers of delays and hazardous conditions is known as?

Answer 22

Freeway Control System

Question 23

Stop times consists of?

Answer 23

1. Clearance time
2. Dwell time

Question 24

The time spent in decelerating and accelerating the vehicle and in opening and closing the doors.

Answer 24

Clearance time

Question 25

The time spent loading and unloading passengers.

Answer 25

Dwell time

Question 26

Route schedules, or timetables, give the times that successive bused pass points called?

Answer 26

Time points

Question 27

Route schedules are most commonly constructed by maintaining approximately uniform headways among successive vehicles during the period of time known as?

Answer 27

Schedule blocks?

Question 28

Headways such that the vehicles are just filled at the maximum load point on the route is known as?

Answer 28

Capacity headways

Question 29

Arbitrarily determined maximum headways intended to represent the minimum acceptable standard for frequency of service is known as?

Answer 29

Policy headways

Question 30

It is considered to be the basic unit of travel behavior. It also involves movement from a single origin to a single destination, and are usually described in terms of their origins, destinations, purposed, times of occurrence, travel modes, and routes.

Answer 30

Trip

Question 31

This means that the utility of any particular trip is partially dependent on the activity it makes possible, and the way in which that activity is valued by the individual.

Answer 31

Derived Utility

Question 32

Intended to predict the number of travelers using various routes and, hence, the traffic on the links of a transportation network.

Answer 32

Trip Assignment Models

Question 33

So far, no explicit consideration has been given to the relationship between the order in which customers arrive demanding service and the order in which they are served. This relationship is referred to as the?

Answer 33

Queue Discipline