List of top Transportation Engineering Questions

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 between the two grades is ______ (rounded off to the nearest integer).
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 veh/km).

Considering \(v_o\) as 45 km/h, and \(k_j\) as 200 veh/km, the maximum flow (in veh/h) for the given stream is (rounded off to the nearest integer).
Which one of the following statements is TRUE?
Which of the following statements is/are TRUE with respect to the type of stresses to be considered for the design of rigid pavements?
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 headlight of a vehicle above the road surface = 0.75 m
Headlight beam angle with respect to the longitudinal axis of the vehicle = \(1.2^\circ\)

Based on the sight distance criteria, the design length (in m) of the vertical curve is (rounded off to the nearest integer).
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 diverted the traffic from the disrupted side to the other side through an opening in a median. The desired sight distance on the four-lane dual carriageway was kept as 360 m under normal conditions. The Stopping Sight Distance (SSD, in m), which should be available on the operating road section after the incident, is
The primary purpose of the Windrose diagram is for the design of
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 combined effect of single or tandem rear axle load and positive temperature differential.
Statement-2: Top-down fatigue cracking (TDC) in rigid pavements is caused due to repeated cycles of axle loads and negative temperature differential.
The CORRECT option is:
Traffic is moving on a 6-lane dual carriageway road (3 lanes per direction). Traffic volume per direction during the peak hour (08:00 am to 09:00 am) is 6000 veh/h, distributed uniformly across the lanes in each direction. Just at 08:00 am, a truck goes out of order on the middle lane of one side, disrupting traffic on that lane. The lane capacity under normal conditions is 2000 veh/h/ln, and under queue formation it is 1600 veh/h/ln. The traffic resumes at 08:30 am on removing the truck from the middle lane. Hourly traffic volume after 09:00 am reduces to 5000 veh/h/dir. The number of vehicles in the queue at 10:00 am is ______ (in integer).
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 specific gravity of these materials is 2.68, 2.45, 2.42, and 1.15. The bulk specific gravity of the mix is 2.2. The Voids Filled with Bitumen (VFB, in percentage) is ______ (rounded off to the nearest integer).
Which of the following statements is/are TRUE in the context of the geometric design of highways?
A road is divided into four sections having varying widths as shown in the figure. Section-2 (S2) represents a capacity constrained condition with respect to the traffic flow passing through Section-1 (S1). Section-3 (S3) and Section-4 (S4) do not face any such capacity constraint with respect to the flow. A flow-density relationship for unconstrained and constrained flow conditions is shown in the figure.

If Section-1 observes density D2, the option representing the correct state of density in Sections 2, 3 and 4 is:
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/h) of the vehicles is (rounded off to two decimal places).
Cant \(C\) on a Broad Gauge railway track is calculated for an equilibrium speed \(V\) (in km/h), dynamic gauge \(G\) (in mm) and radius of curve \(R\) (in m) using formula/formulae:
Given the following conditions, determine the value of the 15-minute Peak Hourly Factor (PHF): Given:
- Vehicles in the peak hour come in 10-minute intervals
- Find the value of the 15-minute PHF
Runway length after elevation and temperature correction is 700 m. The effective gradient is 1%. Find the final corrected length.

Consider the pin-jointed truss shown in the figure. Influence line is drawn for the axial force in the member G-I, when a unit load travels on the bottom chord of the truss. 
Identify the CORRECT influence line from the following options:
Note: Positive value corresponds to tension and negative value corresponds to compression in the member.

After applying the correction for elevation and temperature, the runway length is 700 m.
The corrected runway length (in m) for an effective gradient of 1% is __________ (round off to the nearest integer).
 

Which of the following statements is/are INCORRECT?
 

The free flow speed of a highway is 100 km/h and its capacity is 4000 vehicle/h. Assume speed density relation is linear. For a traffic volume of 2000 vehicle/h, choose all the possible speeds (in km/h) from the options given below (round off to two decimal places).

The figure shows a network diagram for a construction project. The activities A, B, C, D, E, and F are represented by arrows and their durations are in the figure. The total float available for the activity E in day(s) is equal to ......... (round off to the nearest integer). 

A reinforced concrete beam has a support section with width of 300 mm and effective depth of 500 mm. The support section is reinforced with 3 bars of 20 mm diameter at the tension side. Two-legged vertical stirrups of 10 mm diameter and Fe415 steel at a spacing of 100 mm are provided as shear reinforcement. Assume that there is no possibility of diagonal compression failure at the section.
As per IS 456:2000, the maximum shear resisted by the vertical stirrups (in kN), as per limit state design, is ......... (round off to one decimal place).
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
The maximum degree of the curve that can be used for railways in a mountainous region is

In the rigid-jointed frame shown in the figure, the distribution factor of the member AD is closest to