LE 1 Concepts

Question 1

a field or branch of civil engineering that deals with the application of technology and scientific principles to the movement of people and goods

Answer 1

Transportation Engineering

Question 2

phase of transportation engineering that deals with the planning, geometric design, and traffic operatios

Answer 2

Traffic Engineering

Question 3

Flow occurring at long sections of road where vehicles are not required to stop by any cause external to the traffic stream

Answer 3

Uninterrupted Flow

Question 4

Flow occurring at intersections or driveways where vehicles are required to stop by any cause outside the traffic stream such as traffic signs (‘STOP’ or ‘YIELD’), traffic signal lights, etc.

Answer 4

Interrupted Flow

Question 5

the number of vehicles passing a point during a specified period of time

Answer 5

Flow rate or volume

Question 6

rate of motion in distance per unit time

Answer 6

Speed

Question 7

the number of vehicles in a given length of road at an instant point in time

Answer 7

Density or concentration

Question 8

TRUE OR FALSE

Time Mean Speed ≥ Space Mean Speed

Answer 8

TRUE

Question 9

time interval between passage of consecutive vehicles at a
specified point on the road

Answer 9

Headway

Question 10

distance between 2 vehicles measured from the front
bumper of a vehicle to another

Answer 10

Spacing

Question 11

as density ________, speed ________

Answer 11

increases; decreases

Question 12

the maximum hourly rate at which vehicles can reasonably be expected to traverse a point or uniform section of a lane or roadway during a given time period under prevailing roadway, traffic and control conditions

Answer 12

Capacity

Question 13

a qualitative description of how a certain facility is performing

Answer 13

Level of Service (LOS)

Question 14

design hour factor = (design or peak hour volume / 24-hr volume)*100%

Answer 14

k factor

Question 15

D = volume in predominant direction / total volume

Answer 15

directional distribution (directional split)

Question 16

multiply passenger car equivalent factors (PCEF) to convert different vehicle types into a standard car unit
36

Answer 16

pcu or passenger car unit

Question 17

It involves
planning, evaluation, and programming
of transportation facilities , including roadways,
transit terminals, parking, pedestrian facilities,
bikeways, and goods movement.

Answer 17

Transportation Planning

Question 18

CLASSIFICATION
OF URBAN LAND DESCRIBING
THE CONDITION OF
PERFORMED URBAN ACTIVITY

Answer 18

LAND USE

Question 19

Land Use - Transport Interaction

Answer 19

Land Use - Activity Demand - Travel Demand - Transportation Infrastructure - Accessibility - Land Use

Question 20

Models establish relationships
between land use and travel demand patterns.

Answer 20

Forecasting Models

Question 21

Main Functions are to accommodate road traffic
demand and to offer a network on which mass transport network can be established

Answer 21

Road Network

Question 22

Goal of Travel Demand Forecasting

Answer 22

• Estimate the impact of any transportation
  improvement projects on transportation
• Estimate the impact of any
  policies on the
  transportation system on transportation

Question 23

a multi stage
process , and there are several different techniques
that can be used at each stage

Answer 23

Travel Demand Forecasting

Question 24

Basic Steps of Travel Demand Forecasting

Answer 24

(0) Database Development
(1) Trip Generation
(2) Trip Distribution
(3) Modal Split
(4) Traffic Assignment

Question 25

Calculate the number of trips starting in each zone for a particular trip purpose

Answer 25

Trip Generation

Question 26

Produce a table of the number of trips starting in each zone and ending up in each other zone

Answer 26

Trip Distribution

Question 27

Complete the allocation of the various trips among the available transportation systems (bus, train, pedestrian, and private vehicles)

Answer 27

Modal Split

Question 28

Identify the specific routes on each transportation system that will be selected by the travelers

Answer 28

Traffic Assignment

Question 29

should be homogeneous as possible in their land use and/or population composition

Answer 29

Zoning Criteria

Question 30

is a one way movement from a point of origin to a point of destination

Answer 30

Trip

Question 31

future number of trips T’ij is present trips Tij multiplied by growth factors

Answer 31

Growth rate method

Question 32

trip rates are established per household category or land use type; estimated future trips is size multiplied by trip rate

Answer 32

Category analysis

Question 33

future number of trips is a function of socio-economic variables/factors

Answer 33

Regression model

Question 34

Disadvantages of Present Pattern Method

Answer 34

- Complete OD Matrix is required - Change of land use is not considered - Errors are expanded with the same rate

Question 35

Advantages of Model Method

Answer 35

- Trip resistance is considered - Structure of model is easy to understand - Complete OD matrix is not required

Question 36

Disadvantages of Model Method

Answer 36

- Index of resistance is arbitrary - Trip distribution within zone is difficult to treat - Trip distribution for near zone pairs are overestimated

Question 37

Cost of using a mode for conducting the trip

Answer 37

Generalized Cost

Question 38

Based on economic theory that there is an __________ relationship between demand and cost

Answer 38

inverse

Question 39

Methods of Network Assignment

Answer 39

*All-or-nothing *Constant assignment ratio *Incremental assignment