Recent questions in Transportation Engineering

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An incident occurred on one side of a median on a four-lane dual carriageway road section. This incident disrupted the traffic movement in one direction. Traffic police d...
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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...
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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.
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A downgrade of $1$ in $100$ meets an upgrade of $1$ in $125$ on a road. If the rate of change of grade is $0.10 \%$ per $30$ m, the length (in m ) of the vertical curve b...
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Consider the following statements with respect to rigid pavements:Statement-$1$: Bottom-up cracking (BUC) in rigid pavements is caused at the edge of the slab due to comb...
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Which of the following statements is/are TRUE with respect to the type of stresses to be considered for the design of rigid pavements?Warping stress due to temperature di...
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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 $\mathrm{km} / \mathrm{...
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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 $(\mathrm{...
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Corrections are applied to the basic length of the runway strip considering:The elevation $\text{H}$ (in m) of the airport above Mean Sea Level (MSL)Corrected air tempera...
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Cant $C$ on a Broad Gauge railway track is calculated for an equilibrium speed $V$ (in $\mathrm{km} / \mathrm{h}$), dynamic gauge $G$ (in mm ) and radius of curve $R$ (in...
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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 Me...
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A road is divided into four sections having varying widths as shown in the figure. Section-$2$ (S$2$) represents a capacity constrained condition with respect to the traf...
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Which of the following statements is/are TRUE in the context of the geometric design of highways?The coefficient of friction used for the design of horizontal curves is l...
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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 $6000 \mathrm{~veh} / \mathrm{h}$. It i...
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In a bituminous mix, the percentage by weight of coarse aggregate, fine aggregate, filler, and bituminous binder is $58,25,12$, and $5$, respectively. The corresponding s...
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The recommended minimum traffic growth rate and design period considered for structural design of flexible pavements for national highways in India as per $\mathrm{IRC} \...
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After applying the correction for elevation and temperature, the runway length is $700 \: \mathrm{m}$. The corrected runway length (in $\mathrm{m}$) for an effective grad...
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The point where the road alignment changes from a tangent to a curve is known as $\_\_\_\_\_\_\_\_$Point of deflectionPoint of intersectionPoint of curvePoint of tangency
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Which of the following statements is/are INCORRECT?Bitumen having lower softening point is preferred in warm climate regions.The viscosity of bitumen influences the mixin...
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Match the following in $\textbf{Column I}$ with $\textbf{Column II}$.$$ \begin{array}{|l|l|} \hline \textbf{Column I} & \textbf{Column II} \\\hline (1) \text{Vehicle Dam...
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The free flow speed of a highway is $100 \mathrm{~km} / \mathrm{h}$ and its capacity is $4000 \text{ vehicle}/ \mathrm{h}$. Assume speed density relation is linear.For a ...
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On a two-lane highway, a horizontal curve of radius $300 \: \mathrm{m}$ is provided. The design speed is $80 \mathrm{~km} / \mathrm{h}$.If the longest wheelbase of vehicl...
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​​​​All the vehicles that come during a particular peak hour come during a $10$-minute period within this hour. The $15$-minute peak hour factor for this peak hour is$0.2...
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​​​​​​In the context of testing bitumen, which one of the following statements is FALSE:The depth of penetration of needle in the standard penetration test is measured in...
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​​​​​​The maximum degree of the curve that can be used for railways in a mountainous region is$10$$20$$50$$40$
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​​​​​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...
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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}^{...
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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} (\%) ...
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​​​​​In general, the outer edge is raised above the inner edge in horizontal curves forHighways, Railways, and TaxiwaysHighways and Railways onlyRailways and Taxiways onl...
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Various stresses in jointed plain concrete pavement with slab size of $3.5 \mathrm{~m} \times 4.5 \mathrm{~m}$ are denoted as follows:Wheel load stress at interior $=S_{w...
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​​​​​​The consolidated data of a spot speed study for a certain stretch of a highway is given in the table.Speed range $(\mathrm{kmph})$Number of observations$0-10$$7$$10...
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​​​​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...
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A horizontal curve of radius $1080 \mathrm{~m}$ (with transition curves on either side) in a Broad Gauge railway track is designed and constructed for an equilibrium spee...
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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...
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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 ...
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​​​​​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...
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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...
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The number of trains and their corresponding speeds for a curved Broad Gauge section with $437 \mathrm{~m}$ radius, are$20$ trains travel at a speed of $40 \mathrm{~km} /...
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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...
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The following data is obtained from an axle load survey at a site:Average rear axle load $=12000 \mathrm{~kg}$Number of commercial vehicles $=800$ per dayThe pavement at ...