2 (two) lane road width in India as per IRC | two lane carriageway width | width of shoulder for two lane road | width of Roadway for two lane.
Road construction department in India have set up Indian Road Congress (IRC). The Indian Roads Congress (IRC) is the Apex Body of Highway Engineers in the country give the guidelines, rule and regulation of several kinds of roads contraction. It is updated several times with new guidelines. In India, all matters related to Geometric design and structure are handle according to to IRC (Indian Road Congress).
There is several kinds of two Lane Road in india constructed by central and state government in urban and rural areas, such as National Highway (NH), state highway (SH), major district road (MDR), other District road & (ODR). It will be constructed in plain or mountainous steep & hilly area.
2 single lane road or two-lane road is a road that permits two-way travel & traffics, only one lane in each direction and usually no median barrier, one lane used for coming and other is used for going. It is wide enough to allow all types of vehicles to pass one another.
The distance between passing places varies considerably, depending on the terrain and the volume of traffic on the road. A two lane road consists of two main component carriageway (two lane) for travelling & traffic and shoulder for vehicles to stop and accommodation.
Width of a two lane road consist of carriageway width & margin width. Width of margin comprises width of pavement shoulder and unpaved shoulder. A carriageway generally consists of a number of traffic lanes together with any associated shoulder. Road margin is the portion of road beyond the carriageway.
Shoulder are provided along the road edge and on intended for accommodation of stop vehicles, serve as an emergency lane for vehicles and provide lateral support. Shoulder should be strong enough to bear the weight of fully loaded truck even in wet condition.
Shoulder width should be required for giving working space, ideal width of shoulder should be 4.6 m and minimum is about 2.5 m.
Width of shoulder also depending on available space and elevation of surface such as plain, mountainous, steep or hilly area. In Mountain area it is quite difficult to construct a road so width of shoulder is minimised and their width is less than in plain area.
Carriageway width or width of pavement on which vehicles are going on depending on the width of traffic Lane and number of lane. Width of the traffic Lane depending on the width of the vehicles and the side clearance. Side clearance improve the operating speed and safety for vehicles.
As per IRC the maximum permissible width of a vehicle is 2.44m is allowed and desirable side clearance for two Lane road is about 0.53m on both sides and Centre clearance is about 1.06 meter. This require minimum of lane width 3.5m for a two Lane Road without kerb and with kerb it will require 3.75 meter wide.
2 lane road width in India as per IRC
In India, as per IRC rules and guideline, width of a 2 or two or double Lane Road for carriageway is kept around 7 meter wide without kerb & with kerb it will be 7.5 meter wide for National Highway (NH), state highway (SH), major district road (MDR) & other District road (ODR).
In India, according to IRC rules and guidelines, the width of a 2 or double lane road or (NH, SH, MDR, ODR, highway) for carriageway is kept around 7 meter (23 feet) wide without kerb and with kerb it will be 7.5 meter (25 feet) wide.
Width of shoulder for 2 Lane road is kept about maximum of 4.6 m wide on both sides and minimum of 2.5 m wide, so maximum width of roadway (width of carriageway + width of shoulder) for two Lane Road is about 12 m wide and minimum of 9 meter depending on elevation of surface such as plain, mountain or hilly areas.
IRC specification for 2 Lane Road for National highway (NH) and state highway (SH)
● width of carriageway – 7 m without kerb & 7.5 meter with kerb
◆ shoulder width in plain area – 2.5 m (on both sides)
● shoulder width in mountain or hilly area – 0.90 m (on both sides)
● width of roadway in plain area is sum of width of carriageway & shoulder width = (2 × 2.5) + 7 = 12 meter
● width of roadway in mountain area is sum of width of carriageway & shoulder width = (2 × 0.90) + 7 = 8.80 meter.
IRC specification for 2 Lane Road for major district road (MDR)
● width of carriageway – 7 m
◆ shoulder width in plain area – 1 m (on both sides)
● width of roadway in plain area is sum of width of carriageway & shoulder width = (2 × 1) + 7 = 9 meter
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IRC specification for 2 Lane Road for others district road (ODR)
● width of carriageway – 7 m
◆ shoulder width in plain area – 1 m (on both sides)
● width of roadway in plain area is sum of width of carriageway & shoulder width = (2 × 1) + 7 = 9 meter
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Width of a carriageway for 2 Lane Road
As per the guidelines of Indian Road Congress (IRC) for 2 or double Lane Road, width of the carriageway for the National Highway (NH), state highway (SH), major district road (MDR) & others district road (ODR) is about 7 meter (23 feet) wide.
Width of carriageway 7 m wide includes 2.44 m is maximum permissible width of vehicle and 0.53 m is their side clearance on both sides and 1.06 meter centre clearance. This is standard & ideal width of carriageway for single Lane Road.
Width of the shoulder for double Lane Road
As per the guidelines of Indian Road Congress (IRC) for 2 or double Lane Road, the shoulder width on both sides for NH, SH, MDR & ODR is range between 0.90 meter to 2.5 meter (3 feet to 8 feet) depending on certain condition such as elevation of soil surface, plain, mountainous, steep or hilly areas.
In plain area for National and state highway, shoulder width should be adequate for giving working space, it should be 2.5 m wide on both side. In steep, hilly or mountainous areas it is quite difficult to construct Road so shoulder width is minimised and reduced to only about 0.90 m wide on both sides.
Conclusion:
In India, according to IRC rules and guidelines, the width of a 2 or double lane road for carriageway is 7 meter (23 feet) without kerb and 7.5 meter (25 feet) wide with Kerb.