# GATE Questions & Answers of Traffic studies on Flow, Speed, Travel time - delay and O-D study, PCU, Peak hour factor, Parking study, Accident study and Analysis, Statistical analysis of Traffic data

## What is the Weightage of Traffic studies on Flow, Speed, Travel time - delay and O-D study, PCU, Peak hour factor, Parking study, Accident study and Analysis, Statistical analysis of Traffic data in GATE Exam?

Total 8 Questions have been asked from Traffic studies on Flow, Speed, Travel time - delay and O-D study, PCU, Peak hour factor, Parking study, Accident study and Analysis, Statistical analysis of Traffic data topic of Traffic Engineering subject in previous GATE papers. Average marks 1.50.

The speed-density relationship for a road section is shown in the figure.

The shape of the flow-density relationship is

Given the following data: design life n = 15 years, lane distribution factor D = 0.75, annual rate of growth of commercial vehicles r = 6%, vehicle damage factor F = 4 and initial traffic in the year of completion of construction = 3000 Commercial Vehicles Per Day (CVPD). As per IRC:37-2012, the design traffic in terms of cumulative number of standard axles (in million standard axles, up to two decimal places) is ______

Peak Hour Factor (PHF) is used to represent the proportion of peak sub-hourly traffic flow within the peak hour. If 15-minute sub-hours are considered, the theoretically possible range of PHF will be

While traveling along and against the traffic stream, a moving observer measured the relative flows as 50 vehicles/hr and 200 vehicles/hr, respectively. The average speeds of the moving observer while traveling along and against the stream are 20 km/hr and 30 km/hr, respectively. The density of the traffic stream (expressed in vehicles/km) is _________

If the total number of commercial vehicles per day ranges from 3000 to 6000, the minimum percentage of commercial traffic to be surveyed for axle load is

Which of the following statements CANNOT be used to describe free flow speed (uf) of a traffic stream ?

The acceleration –time relationship for a vehicle subjected to non-uniform acceleration is,

$\frac{dv}{dt}=(\alpha-\beta v_0)e^{-\beta t}$

shere, v is the speed in m/s, t is the time in s, $\alpha$ and $\beta$ are parameters, and v0 is the initial speed in m/s. If the accelerating behavior of a vehicle, whose driver intends to overtake a slow moving vehicle ahead, is descried as,

$\frac{dv}{dt}=\left(\alpha -\beta v\right)$

Considering $\alpha$ = 2 m/s2, $\beta$ = 0.05 s-1 and $1.3\;m/s^2\frac{dv}{dt}$ at $t=3s$, the distance (in m) travelled by the vehicle in 35 s is _______.