topic 3: design criteria for highways and railways

Question 1

What are the 5 characteristics in improving design of highways & railways?

Answer 1

1. human factors and driver’s performance
2. vehicles
3. traffic characteristics
4. physical elements
5. economic factors

Question 2

What are the 7 design controls of highway construction?

Answer 2

1. anticipated traffic volume
2. character of traffic
3. design speed
4. design traffic (vehicles)
5. highway capacity
6. classification of highway
7. accident information

Question 3

A road should be designed so that it will accomodate or can be readily changed to accomodate the number of vehicles which is estimated to pass it towards the end of its life. This number is called the _______.

Answer 3

design volume/ anticipated traffic volume

Question 4

In estimating the design volume, the minimum life is commonly assumed to be ____ for a flexible pavement.

Answer 4

10 to 15 years

Question 5

In estimating the design volume, the minimum life is commonly assumed to be ____ for a rigid pavement.

Answer 5

20 years

Question 6

All roads should be designed to accomodate trucks, buses, passenger vehicles, handcarts, cyclists and pedestrians with safety and convenience.

Answer 6

character of traffic

Question 7

What are the 4 general classes of design vehicles?

Answer 7

1. passenger cars
2. buses
3. trucks
4. recreational vehicles

Question 8

The ____ is the speed determined for design and correlation of the physical features of a highway that influence vehicle operation.

Answer 8

design speed

Question 9

The choice of design is influenced principally by the ____, ____, and _____.

Answer 9

1. character of terrain
2. the extent of man-made features
3. economic considerations

Question 10

The operating characteristics of motor vehicles should be considered in analyzing a facility.

Answer 10

design traffic (vehicles)

Question 11

What are te 5 forces that must be overcome by motor vehicles if they are to move?

Answer 11

1. rolling
2. air
3. grade
4. curve
5. inertial resistance

Question 12

Roadway conditions include geometric and other elements. In some cases, these influence the capacity of a road; in others, they can affect a performance measure such as speed, but not the capacity or maximum flow rate of the facility.

Answer 12

highway capacity

Question 13

Certain characteristics distinguish multilane suburban and rural highways from expressways.

Answer 13

classification of highway

Question 14

On all proposed projects, the accidents history should be analyzed and potentially hazardous features and locations identified to determine appropriate safety enhancement.

Answer 14

accident information

Question 15

A study of accident by location, type, severity, contributing circumstances, environmental conditions, and time periods may suggest possible safety deficiencies.

Answer 15

accident information