In signal design as per Indian Roads Congress specifications, if the sum of the
ratios of normal flows to saturation flow of two directional traffic is 0.50 and the
total lost time per cycle is 10 seconds, the optimum cycle length in seconds is

If a two-lane National Highway and a two-lane State Highway intersect at right
angles, the number of potential conflict point at the intersection, assuming that
both the roads are two-way is

Design parameters for a signalized intersection are shown in the figure below. The
green time calculated for major and minor roads are 34 and 18 s, respectively.

The critical lane volume on the major road changes to 440 vehicles per hour per
lane and the critical lane volume on the minor road remains unchanged. The
green time will

A roundabout is provided with an average entry with of 8.4 m, width of weaving
section as 14 m, and length of the weaving section between channelizing islands as 35 m. The crossing traffic and total on the weaving section are 1000 and 2000 PCU per hour respectively. The nearest rounded capacity of the roundabout ( in PCU per hour) is

If the jam density is given as k_j and the free flow speed is given as U_f , the
maximum flow for a linear traffic speed density model is given by which of the
following options

The probability that k number of vehicles arrive (i.e. cross a predefined line) in
time t is given as( λt) ^ke^{-λ t1} / k! , where l is the average vehicle arrival rate. What is the probability that the time headway is greater than or equal to time t₁ ?

A two-lane urban road with one-way traffic has a maximum capacity of 1800 vehicles/hour. Under the jam condition, the average length occupied by the vehicles is 5.0 m. The speed versus density relationship is linear. For a traffic volume of 1000 vehicles/hour, the density (in vehicles/km) is

A pavement designer has arrived at a design traffic of 100 million standard axles for a newly developing national highway as per IRC : 37 guidelines using the following data : life = 15 years, commercial vehicle count before pavement construction = 4500 vehicles/day, annual traffic growth rate = 8%. The vehicle damage factor used in the calculation was

Two major roads with two lanes each are crossing in an urban areas to form an uncontrolled intersection. The number of conflict points when both roads are one way is “X” and when both roads are two way is “Y ”. The ratio of X to Y is