Highway Geometric Design MCQ Quiz in తెలుగు - Objective Question with Answer for Highway Geometric Design - ముఫ్త్ [PDF] డౌన్లోడ్ కరెన్
Last updated on Mar 14, 2025
Latest Highway Geometric Design MCQ Objective Questions
Top Highway Geometric Design MCQ Objective Questions
Highway Geometric Design Question 1:
As per Indian standards, what is minimum lateral clearance (normal) for major district roads?
Answer (Detailed Solution Below)
Highway Geometric Design Question 1 Detailed Solution
Explanation:
Lateral Clearance:
(i) Lateral Clearance is the distance between the extreme edge of the carriageway to the face of the nearest support weather it is a solid abutment, pier, or column.
(ii) Clause 6.1.1 IRC 54:1974 gives clear guidelines regarding the lateral clearance on the single carriageway for different types of roads.
Type of Road |
Lateral Clearance |
|
Normal (m) |
Exceptional (m) |
|
National Highway or State Highway |
2.5 |
2.0 |
Major District Road & Other District Roads |
2.0 |
1.5 |
Village Roads |
1.5 |
1 |
Highway Geometric Design Question 2:
Which of the following is correct statement for the cross slope of the shoulder?
Answer (Detailed Solution Below)
Highway Geometric Design Question 2 Detailed Solution
Shoulders are provided along the road edge and is intended for accommodation of stopped vehicles, serve as an emergency lane for vehicles and provide lateral support for base and surface courses. The shoulder should be strong enough to bear the weight of a fully-loaded truck even in wet conditions.
The shoulder width should be adequate for giving working space around a stopped vehicle. It is desirable to have a width of 4.6 m for the shoulders. The minimum width of 2.5 m is recommended.
Cross slope for the shoulder is 0.5% steeper than the cross slope of the pavement.
Important Points:
Cross slope to be provided for different types of pavement are as follows:
Type of pavement |
Heavy Rain |
Light Rain |
Cement Concrete and high type bituminous surface |
1 in 50 |
1 in 60 |
Thin Bituminous surface |
1 in 40 |
1 in 50 |
WBM, gravel pavement |
1 in 33 |
1 in 40 |
Earthen roads |
1 in 25 |
1 in 33 |
Highway Geometric Design Question 3:
Which of the followings are CORRECT values for coefficient of lateral and longitudinal friction as per IRC?
Answer (Detailed Solution Below)
Highway Geometric Design Question 3 Detailed Solution
Explanation:
- The longitudinal friction on the highway for calculation of stopping distance in geometrical design is 0.35 to 0.40.
- Recommended value of the lateral friction coefficient by the Indian Road Congress is 0.15.
Two types of friction generally considered in highway design are as follows:
1. Lateral/Side/Traverse friction: It acts to counter the centrifugal force acting on the tyre in the lateral direction.
Recommended value of lateral friction coefficient by the Indian Road Congress is 0.15.
However, in the case of expressways, it can be reduced even to 0.1 with a design speed of 120 kmph.
2. Longitudinal/Rolling friction: It acts in the rolling direction of tyres of the vehicle.
Recommended value of longitudinal friction by Indian Road Congress are as follows:
V (kmph) |
≤ 30 |
40 |
50 |
60 |
≥ 80 |
f |
0.40 |
0.38 |
0.37 |
0.36 |
0.35 |
Highway Geometric Design Question 4:
The overall width between building lines for expressways as per recommended is -
Answer (Detailed Solution Below)
Highway Geometric Design Question 4 Detailed Solution
Explanation:
Recommended standards for building line and control line:
Road classification | Plain and rolling terrain | ||
Open area | Build up area | ||
width building line, m | width between & control line | Setback distance(m) | |
Expressway | 110 | 130 | 5 |
NH/SH | 80 | 150 | 3 - 6 |
MDR | 50 | 100 | 3 - 5 |
ODR | 25/30 | 35 | 3 |
VR | 25 | 30 | 3 - 5 |
Cross-section of highway with various lines:
Highway Geometric Design Question 5:
Which is not correctly matched about extra widening:
Answer (Detailed Solution Below)
Highway Geometric Design Question 5 Detailed Solution
Explanation:
Extra widening of road is given by,
We = Wm + Wps
\({W_e} = \frac{{n{l^2}}}{{2R}} + \frac{V}{{9.5\sqrt R }}\)
Where,
Wm = Mechanical widening, Wps = Psychological widening, n = number of lanes, l = length of wheelbase, R = Radius of curve, V = Velocity of vehicle (in kmph)
IRC recommended values of extra widening for single and two-lane pavement are given below:
1) If R > 300 m, then extra widening is not provided.
2) If R < 50 m, Then extra widening is provided at the inner edge.
3) If 50 < R < 300 m, then extra widening is provided at both edges.
Highway Geometric Design Question 6:
Exceptional gradient is to be provided for only short distances of road not exceeding about ________ metres in one kilometre road length.
Answer (Detailed Solution Below)
Highway Geometric Design Question 6 Detailed Solution
Explanation:
Exceptional gradient:
- The exceptional gradient is steeper than the ruling gradient and the limiting gradient
- It is provided only if the situation is unavoidable. It should not be provided for a length of more than 100 m.
- Critical length of the grade (for exceptional gradient only):
- Length of road covered by a heavily loaded truck on an ascending gradient without too much reduction in speed. The reduction in speed should not be more than 25 kmph.
Important Points
Gradient:
- A gradient is the rise or fall along the length of the road with respect to horizontal. It is expressed as 1 in n (1 vertical to n horizontal) or n% i.e. n in 100.
- There are different types of gradients:
- Ruling gradient: It is the maximum gradient within which the designer wants to design the vertical profile of the road, hence it is known as the design gradient
- Limiting gradient: It is steeper than the ruling gradient
- Exceptional gradient: Discuss above
- Minimum gradient: It is provided along the length of the road from drainage point of view. The minimum gradient for cement concrete drain is 1 in 500.
Gradients for different terrain types:
Terrain type | Ruling gradient | Limiting gradient | Exceptional gradient |
Plain and rolling | 3.3% | 5% | 6.7% |
Mountainous and steep terrain having an elevation more than 3000 m above M.S.L. | 5% | 6% | 7% |
Mountainous and steep terrain having elevation not more than 3000 m above M.S.L. | 6% | 7% | 8% |
Highway Geometric Design Question 7:
The steepest gradient permitted on roads which, in ordinary conditions, where ruling gradient is not possible, does not exceed, is known
Answer (Detailed Solution Below)
Highway Geometric Design Question 7 Detailed Solution
Concept:
Gradient: Gradient is the rate of rise or falls along the length of the road with respect to horizontal.
Expressed as ‘1' vertical unit to 'N' horizontal units.
Types of Gradient:
i) Ruling gradient:
- The gradient is fixed in such a way that maximum power developed by the engine is equal to the power required to overcome the resistance to the motion on the grade at design speeds.
ii) Limiting gradient:
- A gradient steeper than the ruling gradient which may be used in restricted length, where the ruling gradient is not possible.
iii) Exceptional gradient:
- A gradient steeper than the limiting gradient which may be used in very short stretchers only in an exceptional case.
iv) Floating gradient:
- The gradient on which a motor vehicle moving with a constant speed continues to descend with the same speed without any application of power brakes is called floating gradient i.e the vehicle does not require any tractive effort to maintain the specific speed.
∴ Limiting gradient is the steepest gradient permitted on roads in ordinary conditions and in some extraordinary situations it may be unavoidable to provide still steeper gradients at least for short stretches and in such cases, the steeper gradient up to exceptional gradients may be provided. The ruling gradient or the design gradient is the gradient with which the designer attempts to design the vertical profile of the road.
Note:
Terrain |
Ruling |
Limitings |
Exceptional |
Plain/Rolling |
3.3 |
5.0 |
6.7 |
Hilly |
5.0 |
6.0 |
7.0 |
Steep |
6.0 |
7.0 |
8.0 |
Highway Geometric Design Question 8:
Assuming the safe stopping sight distance to be 80 m on a flat highway section and with a setback distance of 10 m. What would be the radius of the negotiable horizontal curve?
Answer (Detailed Solution Below)
Highway Geometric Design Question 8 Detailed Solution
Approximate formulas for calculation of set back distance
Case - 1 If the length of the curve > sight distance (SSD)
setback distance, \(m=\frac{s^2}{8R}\) ; R = Radius of curve
Case - 3 If the length of curve < sight distance (SSD)
Setback distance, \(m=\frac{L(2S-L)}{8R}\)
In this out, length of the curve is not given, assuming the next length of the curve is more than SSD.
So, \(\rm{m = \frac{S^2}{8R} \begin{pmatrix} m = 10 \ m \\\ S = 80 \ m \end{pmatrix}}\)
\(10=\frac{(80)^2}{8\times R}\)
We get, R = 80 m
Highway Geometric Design Question 9:
Gradient on a highway is 1 in 20. Radius of the curve is 200 m. After grade compensation the grade to be provided should not be less than 4%. Calculate the grade compensation.
Answer (Detailed Solution Below)
Highway Geometric Design Question 9 Detailed Solution
Concept:
Grade Compensation = minimum of \(\left\{ {\frac{{75}}{R},\frac{{30 + R}}{R}} \right\}\)%
Calculation:
Grade Compensation = minimum of \(\left\{ {\frac{{75}}{{200}},\frac{{30 + 200}}{{200}}} \right\}\)
Grade Compensation = minimum of {0.375, 1.15}
Grade Compensation = 0.38%Highway Geometric Design Question 10:
A two-lane State Highway with a bituminous concrete surface is to be constructed. What should be the height of the crown with respect to the edges, assuming straight-line camber? Assume heavy rainfall.
Answer (Detailed Solution Below)
Highway Geometric Design Question 10 Detailed Solution
Explanation:
Maximum height of crown with respect to edges \( = \frac{W}{{2n}}\)
Where W is the width of the pavement.
Now for high-type bituminous in high rainfall areas, camber provided = 1 in 50, W = 7 m
∴ Maximum height of the crown \(= \frac{{7 \times {{10}^3}}}{{2 \times 50}} = 70\;mm\)
Maximum height of crown = 0.07 m
Additional Information
Camber of pavement depends on
- Type of pavement
- The intensity of rainfall (Light/Heavy rain)
Type of pavement |
Heavy Rain |
Light Rain |
Cement Concrete and high-type bituminous surface |
1 in 50 |
1 in 60 |
Thin Bituminous surface |
1 in 40 |
1 in 50 |
WBM, gravel pavement |
1 in 33 |
1 in 40 |
Earthen roads |
1 in 25 |
1 in 33 |