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Extra Widening Of Pavement On Curve Road

Posted on 28th March 201922nd August 2020 By Malay Sautya No Comments on Extra Widening Of Pavement On Curve Road

Extra Widening Of Pavement On Curve Road

When a vehicle takes a turn to negotiate a horizontal curve, the rear wheels do not follow the same path as that of the front wheels. Normally the rear wheels follow the inner path on the curve as compared with front wheels.

Extra Widening Of Pavement On Curve Road

The vehicle has occupies more width that it occupies on straight portion of the road. To compensate this, the carriageway width increased on the entire curved portion of the road, which is called extra widening of pavement on curve.

Read More: Method of Providing Extra Widening

The formula of Extra widening

The total extra widening (We) required on a horizontal curve is given by the following equation:

We (in m) = Mechanical widening(Wm) + Psychological widening(Wps) = nl²/2R + V/9.5√R 

Formula of Extra widening

Where ‘n‘ is the number of the traffic lane, l is the length of the wheelbase of the longer vehicle in m (generally taken as 6 m), V is the design speed of the vehicle in Km/h and R is the radius of the horizontal curve in m.

Read Also:

Necessity of Providing Extra Widening of Pavement on Curve

Analysis of Superelevation Formula as Per I.R.C

Highway engineering

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