Recent questions and answers in Transportation Engineering

Which one of the following statements is TRUE?Cant deficiency is related to train moving faster, and Cant excess is related to train moving slower.Cant deficiency is rela...

The primary purpose of the Windrose diagram is for the design oflength of a runway.orientation of a runway.width of a runway.gradient of a runway.

A two lane, one-way road with radius of $50$ m is predominantly carrying lorries with wheelbase of $5$ m. The speed of lorries is restricted to be between $60$ kmph and $...

A super-elevation $e$ is provided on a circular horizontal curve such that a vehicle can be stopped on the curve without sliding. Assuming a design speed $v$ and maximum ...

A road is being designed for a speed of $110$ km/hr on a horizontal curve with a super elevation of $8 \%$. If the coefficient of side friction is $0.10$, the minimum rad...

The perception-reaction time for a vehicle travelling at $90$ km/h, given the coefficient of longitudinal friction of $0.35$ and the stopping sight distance of $170$ m (a...

The base length of the runway at the mean sea level $\text{(MSL)}$ is $1500 \; \text{m}.$ If the runway is located at an altitude of $300 \; \text{m}$ above the $\text{(M...

The shape of the most commonly designed highway vertical curve iscircular (single radius)circular (multiple radii)parabolicspiral

A highway designed for $\text{80 km/h}$ speed has a horizontal curve section with radius $\text{250 m}$. If the design lateral friction is assumed to develop fully, the r...

The lane configuration with lane volumes in vehicles per hour of a four-arm signalized intersection is shown in the figure. There are only two phases: the first phase is ...

Consider the four points $\text{P, Q, R and S}$ shown in the Greenshields fundamental speed-flow diagram. Denote their corresponding traffic densities by $k_{P}, k_{Q}, k...

Relationship between traffic speed and density is described using a negatively sloped straight line. If $v_{f}$ is the free flow speed then the speed at which the maximum...

On a road, the speed – density relationship of a traffic stream is given by $u=70-0.7k$ (where speed, $u$, is in $\text{km/h}$ and density, $k$ is in $\text{veh/km}$). At...

Vehicular arrival at an isolated intersection follows the Poisson distribution. The mean vehicular arrival rate is $2$ vehicle per minute. The probability ($\textit{round...

The free mean speed is $60 \mathrm{~km} / \mathrm{hr}$ on a given road. The average space headway at jam density on this road is $8 \mathrm{~m}$. For a linear speed-densi...

The figure presents the trajectories of six vehicles within a time-space domain. The number in the parentheses represents unique identification of each vehicle.The mean s...

A parabolic vertical crest curve connects two road segments with grades $+1.0 \%$ and $-2.0 \%.$ If a $200 \; \text{m}$ stopping sight distance is needed for a driver at ...

​​​​​In general, the outer edge is raised above the inner edge in horizontal curves forHighways, Railways, and TaxiwaysHighways and Railways onlyRailways and Taxiways onl...

A vertical summit curve on a freight corridor is formed at the intersection of two gradients, $+3.0 \%$ and $-5.0 \%$.Assume the following:Only large-sized trucks are all...

During determination of the bulk specific gravity of compacted bituminous specimen, the mass in air of the specimen is $1260 \mathrm{g}$ and volume is $525 \mathrm{~cm}^{...

In an aggregate mix, the proportions of coarse aggregate, fine aggregate and mineral filler are $\text{55%, 40% and 5%}$, respectively. The values of bulk specific gravit...

For a $2^{\circ}$ curve on a high speed Broad Gauge $\text{(BG)}$ rail section, the maximum sanctioned speed is $\text{100 km/h}$ and the equilibrium speed is $\text{80 k...

A car is travelling at a speed of $60 \mathrm{~km} / \mathrm{hr}$ on a section of a National Highway having a downward gradient of $2 \%$. The driver of the car suddenly ...

​​​​​As per the International Civil Aviation Organization (ICAO), the basic runway length is increased by $x(\%)$ for every $y(\mathrm{~m})$ raise in elevation from the M...

​​​​In the context of pavement material characterization, the CORRECT statement(s) is/areThe load penetration curve of $\text{CBR}$ test may need origin correction due to...

​​​​​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 fl...

The longitudinal sections of a runway have gradients as shown in the table.\begin{array}{|c|c|}\hline \text{End to end for sections of runway (m)} & \text{Gradient} (\%) ...