level: Level 1
Questions and Answers List
level questions: Level 1
| Question | Answer |
|---|---|
| 10 Key intersections | Adequate capacity - form of control conflict points Preference major flows Define veh paths ad SD form of control All RU Control veh speeds |
| Min conflict points | Stag T's to decrease CP. left stagger 67% greater |
| Cost Consequences of geometric design | Land, pavement, accidents, maintenance |
| Design standards | Costs, terrain, traffic volume, hierarchy, safety, environment |
| Desired speed | Drivers decision |
| Operating speed | estimation |
| Design speed | greater than operating |
| Factors affecting design | Design speed, safe f and e |
| Types of curves | Circular, transition, reverse |
| Curves to avoid | Compound Broken back |
| Friction depends on | road surface tyres breaks weather |
| Superelevation | prevent sliding, slipping decreases hazards less than 10% |
| Transition curve criteria | Rate of change of radial acc - Forces on body Rate of rotation (warp) - comfort Relative grade |