A traffic stream is described as unstable when a small increase in demand causes:
Correct answer: A. A significant reduction in operating speed
- A. A significant reduction in operating speed
- B. A permanent increase in lane width
- C. A reduction in vehicle dimensions
- D. An increase in pavement thickness
Explanation
Unstable flow occurs near or beyond capacity, where a small demand increase can produce a sharp speed reduction and congestion. Lane width and pavement thickness are not consequences of traffic-stream stability.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Transportation Engineering
Transportation engineering covers highway planning and alignment, traffic studies, road geometric design, pavement materials and flexible or rigid pavement construction. It also includes railway, airport and traffic engineering concepts such as sight distance, superelevation, signals, capacity and level of service, distinguishing pavement failure from poor geometric design.
Practise Transportation Engineering
80 free Transportation Engineering MCQs from Civil Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Civil Engineering questions like this
Civil Engineering is on 3 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Transportation Engineering questions
In traffic engineering, the capacity of a roadway is best defined as the maximum number of vehicles that can pass a point during a specified period under:
For a highway crest curve, the required length is commonly controlled by providing adequate:
The principal purpose of a subbase beneath a cement concrete pavement is to:
Runway numbers at an airport are generally based on the runway's:
In railway engineering, creep of rails refers to their:
On a highway curve, the maximum permissible superelevation is limited mainly to prevent: