Highway Engineering Questions and Answers – Traffic Engineering Studies and Analysis – 2

This set of Highway Engineering Interview Questions and Answers for Experienced people focuses on “Traffic Engineering Studies and Analysis – 2”.

1. The annual average daily traffic is calculated by which of the formula?
a) ADT*DF*WF
b) ADT*DF*WF*SF
c) ADT*WF
d) ADT*SF
View Answer

Answer: b
Explanation: The AADT is given by AAADT=ADT*DF*WF*SF, it depends on traffic, day, season and week.

2. Running speed of a vehicle is equal to __________
a) Travel speed+ delay
b) Travel speed
c) Travel speed-delay
d) Average of travel speed and delay
View Answer

Answer: c
Explanation: The running speed of a vehicle is obtained by dividing the distance with a time of travel and subtracting the delays.

3. The speed at any instant of time is called __________
a) Running speed
b) Travel speed
c) Spot speed
d) Space speed
View Answer

Answer: c
Explanation: The speed at any instant of time is called as spot speed or instantaneous speed, running speed is during travel and the average speed of travel is travel speed.
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4. Which of the following relationship is correct?
a) Travel speed= running speed
b) Travel speed< running speed c) Travel speed>running speed
d) Travel speed=1.5 times of running speed
View Answer

Answer: b
Explanation: Running speed is always greater than travel speed as the travel speed always includes the stopped delays.

5. Peak hour factor is expressed in percentage of __________
a) ADT
b) AADT
c) PCU
d) DF
View Answer

Answer: b
Explanation: Peak hour factor is expressed in the percentage of AADT; it is used in the design of transportation facilities and major projects.
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6. How many types of traffic speed studies are conducted?
a) One
b) Two
c) Three
d) Four
View Answer

Answer: b
Explanation: There are two types of studies conducted for speed, they are (i) spot studies (ii) speed and delay studies.

7. If the distance of a vehicle moved is 25m and the observed travel time is 15 sec then space mean speed is?
a) 4m/s
b) 5m/s
c) 6m/s
d) 7m/s
View Answer

Answer: c
Explanation: Space mean speed=3.6*25/15
=6m/sec.
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8. If space mean speed of a vehicle is 50kmph, then the time mean speed will be __________
a) Less than 50kmph
b) Greater than 50kmph
c) Equal to 50kmph
d) Depends on the vehicle
View Answer

Answer: b
Explanation: The Time mean speed will always be greater than space mean speed and it will be greater than 50kmph.

9. If the instantaneous speed of 4 vehicles are 35, 40, 45 and 50 then the time mean speed will be __________
a) 40kmph
b) 41 kmph
c) 41.5kmph
d) 42.5kmph
View Answer

Answer: d
Explanation: The space mean speed is given by
Vt=V1+V2+V3+V4/(4)
=35+40+45+50/ (4)
=42.5kmph.
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10. The geometric design in India are designed for __________
a) 85th percentile speed
b) 15th percentile speed
c) 98th percentile speed
d) 100 percentile speed
View Answer

Answer: c
Explanation: In India mostly the road geometrics are designed for 98th percentile speed, the upper limit for speed is 85th percentile and lower limit is 15th percentile.

Sanfoundry Global Education & Learning Series – Highway Engineering.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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