REVIEW PAPER ON EFFECT OF FRICTION FACTORS ON CAPACITY AND SPEED (KEY IJP************062)

• Dabloo Kumar,Shivani

Abstract

The estimation of roadway capacity is essential in planning, designing, and operation of highway facilities. Capacity and speed of road suffers a loss due to various factors such as geometric parameters, environmental parameters, city size factors, side friction factors etc. The environmental parameters include rainy conditions, fog, temperatures etc. The effect of friction factors can cause jam conditions in urban stretches, so need to be investigated and some regression equations need to be established between capacity and friction factor to know impact of friction factors. Better characteristics (geometrics, environmental etc.) of road may lead to higher capacity and higher speed at a certain flow.The thesis aims at, to develop the speed flow relationship for the four lane urban road and to find out effect of friction factor on capacity and speed of road. Friction factor includes major effects such as pedestrian movements, parking & stopping vehicles, exitentry vehicles into traffic stream, unmotorized vehicles etc. At high side friction value there is significant difference between actual speed and those without friction i.e. very low friction from side. These capacity values are compared with IRC: 106-1990. At low side friction value, capacity and speed does not affect much but at high side friction losses in capacity and speed are high. Therefore, the optimum dosage of steel fibers was determined to be 3 %.