Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
points where traffic flow converges and where direction of travel changes |
highway intersections |
|
|
according to shape |
- three leg: T or Y - four leg: normal crossing, oblique, or skewed/staggered - multileg: intersections with more than four legs - rotary or roundabout |
|
|
Categories of intersections |
- according to shape - according to structure - according to operation |
|
|
according to structure |
- at grade - grade separated: flyover/overpass, underpass, interchanges |
|
|
according to operation |
- Channelized or unchannelized - signalized or unsignalized |
|
|
leads to simplified movements of vehicles as it leads drivers to one conflict at a time |
channelization |
|
|
greatly reduces crossing conflicts at the intersection area |
signalization |
|
|
basic intersection design principles |
- maximum number of legs should be four - staggered intersections should be avoided - main traffic flow should be near straight as possible - roads should not intersect at a small angle. 60° should be the minimum. - two intersections should be as far as possible from each other |
|
|
Classification if conflicts |
- merging - diverging - crossing: through-flow, turning flow |
|
|
Categories of intersection controls |
- unsignalized - signalized - grade-separation solution |
