Chapter 9 Flashcards
1
Q
Roads
A
- Urban roads
- Rural roads
2
Q
Characteristics of urban roads
A
- Traffic congested
- Short travel distance
- Less rough road surface
- Max speed: 70km/h
3
Q
Characteristics of rural roads
A
- Less congested
- Long travel distance
- Rough road surface
- High travelling speed
4
Q
Parts of a road section
A
- Drain
- Side table / shoulder
- Carriageway / riding surface
- Crown
5
Q
Type of carriageway
A
- Single
- Dual
6
Q
Type of road construction
A
- Flexible pavement
- Rigid pavement
7
Q
Advantages of flexible pavement
A
- It has good non-skid properties
- Reasonably good appearance
- Cheap to reinstate
8
Q
Disadvantages of flexible pavement
A
- Initial cost slightly more expensive than concrete road
- High maintenance cost
9
Q
Advantages of rigid pavement
A
- Initial cost is considerably low
- Good resistance to skidding
- Can last for many years if well constructed
10
Q
Disadvantages of rigid pavement
A
- Very liable to subsidence damages
- Causes glare from the sun
- Expensive to reinstate
11
Q
Terms used in road construction
A
- Sub-base
- Road-base
- Surfacing
- Formation
12
Q
Purpose of road maintenance
A
- Ensure that ponding does not occur
- Ensure that cross fall is retained
- Ensure that the road defects are corrected
13
Q
Main defects in bituminous surface roads
A
- Corrugation
- Cracking
- Slick surface
14
Q
Types of bituminous materials
A
- Tar
- Pitch
- Asphalt
15
Q
Factors of bituminous materials
A
- Relatively inexpensive
- Durability
- Waterproofing
- Low boiling point
