Monday 15 August 2016
Friday 12 August 2016
Highway Design-Parking Along Highways and Arterial Streets
These paragraphs below deal with parking as it pertains to the mainlanes of a controlled access highway, the frontage roads for such a facility, and parking along urban and suburban arterials. Rest areas as parking facilities are not considered in this article.
Emergency Parking
Parking on and adjacent to the mainlanes of a highway will not be permitted except for emergency situations. It is of paramount importance, however, that provision be made for emergency parking. Shoulders of adequate design provide for this required parking space.
Curb Parking
In general, curb parking on urban/suburban arterial streets and frontage roads
should be discouraged. Where speed is low and the traffic volumes are well below capacity, curb parking may be permitted. However, at higher speeds and during periods of heavy traffic movement, curb parking is incompatible with arterial street service and desirably should not be permitted. Curb parking reduces capacity and interferes with free flow of adjacent traffic.
should be discouraged. Where speed is low and the traffic volumes are well below capacity, curb parking may be permitted. However, at higher speeds and during periods of heavy traffic movement, curb parking is incompatible with arterial street service and desirably should not be permitted. Curb parking reduces capacity and interferes with free flow of adjacent traffic.
Elimination of curb parking can increase the capacity of four-to-six lane arterials by 50 to 60 percent. If curb parking is used on urban/suburban arterials or frontage roads under the conditions stated above, the following design requirements should be met:
- provide parking lanes only at locations where needed
- parallel parking preferred
- confine parking lanes to outer side of street or frontage road
- require that parking lane widths be 10 feet [3.0 meters]
- restrict parking a minimum of 20 feet [6 meters] back from the radius of the intersection to allow for sight distance, turning clearance and, if desired, a short right turn lane.
Thursday 11 August 2016
Difference between Bridge and Flyover
The difference between Bridge and Flyover is based on the purpose of its usage and the location where it is built.
Bridges
Bridges
- Bridges are built to connect two points separated by a naturally occurring region like valley, river, sea or any other water bodies, etc.
- They are usually lengthy depending upon the width of the valley or river.
- Construction over river is tedious since foundation has to be carried out on the river bed.
- Bridges are usually built for trains, buses and cars.
Flyovers
- It is a structure which joints two or more points which are separated by an accessible route/s or a man made structure to cut the traffic for faster mode of travelling.
- They are usually made over road junctions, roads, streets, etc.
- The name itself suggests that you are flying over a traffic zone.
- They are usually built for road vehicles.