What does Clearzone mean?
What does Clearzone mean?
A Clear Zone is an unobstructed, traversable roadside area that allows a driver to stop safely, or regain control of a vehicle that has left the roadway. The width of the clear zone should be based on risk (also called exposure). Key factors in assessing risk include traffic volumes, speeds, and slopes.
What is a desirable recoverable slope for clear zones for roadside design?
Recommended clear zone for 1:6 slope (fill): 32 ft (Table 4-6.04A).
What is side slope and back slope?
Background: MaineDOT defines sideslope as the slope from the edge of roadway to the toe of ditch or toe of fill slope. The backslope is defined as the slope from the toe of ditch to the top of slope on the backside of the ditch.
What is clear recovery zone?
AASHTO and Federal Highway Administration (FHWA) define the clear recovery zone (CRZ) for recoverable foreslopes as an unobstructed, relatively flat (4:1 or flatter) or gently sloping area beyond the edge of traveled way that affords the driver of errant vehicles the opportunity to regain control.
What do zones on highways mean?
A work zone is an area where roadwork takes place and may involve lane closures, detours and moving equipment. Highway work zones are set up according to the type of road and the work to be done on the road. Work zones on U.S. highways have become increasingly dangerous places for both workers and drivers.
Where is the clear zone?
The Roadside Design Guide defines a clear zone as the total roadside border area, starting at the edge of the traveled way, available for safe use by errant vehicles. This area may consist of a shoulder, a recoverable slope, a non-recoverable slope, and/or a clear run-out area.
How do you calculate clear zone?
What is edge of traveled way?
Traveled way means the width from curb to curb on curbed streets, from edge to edge on asphalt non-curbed streets, and from shoulder to shoulder on gravel streets.
What is the most common collision in a work zone?
Rear-end crashes
Rear-end crashes (running into the rear of a slowing or stopping vehicle) are the most common type of work zone crash. Fatal work zone crashes occur most often in summer and fall.
What is the meaning of the word traversable?
Anglo-French traverser, literally, to lay across, bar, impede, from Old French, from Late Latin transversare to cross, from Latin transversus lying across Love words? Need even more definitions? Subscribe to America’s largest dictionary and get thousands more definitions and advanced search—ad free!
What does it mean to traverse a mountain?
to go up, down, or across (a rope, mountain, hill, etc.) at an angle: The climbers traversed the east face of the mountain.
Which is the best synonym for traversable ice?
Roads, traversable by artillery and excellent for cavalry, ran thence in every direction. The northern Quarken is covered with traversable ice every third or fourth year. Most of Toledo is traversable only for pedestrians and donkeys. The Heimliche Acht is a presentment not traversable by the offender.
What makes a snowshoe traverse a snowfield?
While traversing a snowfield, though, Forrest twisted his knee. Modernized snowshoes are made of metal and plastic, but the addition of dull crampons on their underside allows you to traverse larger hills.