transportation

The travel times of three vehicles on a 2 km stretch of road are 4, 5, and 8 minutes. Assuming the speed of each vehicle to be constant in this stretch, the Space Mean Speed (in km...

For a given traffic stream, the speed-density relationship is given as: $v = v_o \ln \left(\frac{k_j}{k}\right)$ where $v$ is the mean speed (in km/h), and $k$ is the density (in v...

Traffic is moving on a 6-lane dual carriageway road. Traffic volume per direction during peak hour (08:00 am to 09:00 am) is 6000 veh/h. It is assumed that the traffic is distribut...

A vertical curve is formed by a descending gradient of 1 in 40 meeting an ascending gradient of 1 in 50. Consider the following: Stopping Sight Distance (SSD) = 90 m Height of head...

The speed-density relation on a one-way, single lane road is shown in the figure, where speed u is in km/hour and density k is in vehicles/km. The maximum flow (in vehicles/hour) o...

In general, the outer edge is raised above the inner edge in horizontal curves for

The free mean speed is 60 km/hr on a given road. The average space headway at jam density on this road is 8 m. For a linear speed-density relationship, the maximum flow (in veh/hr/...

The figure presents the trajectories of six vehicles within a time-space domain. The number in the parentheses represents unique identification of each vehicle. (Figure NOT to scal...

Which of the following is equal to the stopping sight distance?

A plot of speed-density relationship (linear) of two roads (Road A and Road B) is shown in the figure. If the capacity of Road A is $C_A$ and the capacity of Road B is $C_B$, what...

Which of the following options match the test reporting conventions with the given material tests in the table? Test reporting convention (P) Reported as ratio (Q) Reported as perc...

For a traffic stream, v is the space mean speed, k is the density, q is the flow, vf is the free flow speed, and kj is the jam density. Assume that the speed decreases linearly wit...

Consider the four points P, Q, R, and S shown in the Greenshields fundamental speed-flow diagram. Denote their corresponding traffic densities by $k_P$, $k_Q$, $k_R$, and $k_S$, re...

The vehicle count obtained in every 10 minute interval of a traffic volume survey done in peak one hour is given below. Time Interval (in minutes) | Vehicle Count ---|--- 0 – 10 |...

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 r...

A car follows a slow moving truck (travelling at a speed of 10 m/s) on a two-lane two-way highway. The car reduces its speed to 10 m/s and follows the truck maintaining a distance...