604 : Transportation Engineering - II (C) Time : 3 Hours Max. Marks : 100 Instructions: 1) Answer all questions. 2) Part $\boldsymbol{A}$ - each question carries 4 marks. 3) Part B - each question carries 20 marks. I. Answer all questions. e) List down five important failures commonly observed in bituminous pavements. f) What are the requirements of an ideal highway drainage system ? g) List down the factors that affect airport operating capacity. h) With neat sketches explain the various types of aircraft parking systens. LIBRARY S.T.O. Answer any one full question from each Module． ## \section{Module－I <br> <br> \section{N} <br> <br> Module－I} II．a）Derive an expression for determining the overtaking sight distance on a two lane highway． b）Calculate the maximum allowable speed on a horizontal curve of radius 300 m if the maximum allowable value of lateral friction is 0.15 and rate of superelevation is 0．07． OR III．a）A sag curve is to be designed where two gradients $-2 \%$ and $+2.5 \%$ meet．The design speed is 80 kph and stopping sight distance is 150 m ．Find the length of curve for i）riding comfort ii）head light sight distance． b）Derive an expression for finding the superelevation required．What are the IRC recommendations for maximum valve of superelevation for highway pavements ？ O a）A sag curve is to be designed where two gradients $-2 \%$ and $+2.5 \%$ meet．The peed is 80 kph and stopping sig． ht distance is 150 m ．Find the length of curve for i） ii）head light sight distance．啨＂ L rid din ） $\_\_\_\_$ ．a） Derive an ex lane highway Calculate the the maximum superelevation r res IO $\_\_\_\_$的的＂的的＂＂ □ － VI. a) Explain the terms i) Approach zqne ii) Turning zone iii) Runway clear zone. iv) Apron. Mean maximum daily temperature $=42.6^{\circ} \mathrm{C}$ Mean average daily temperature $\quad=27.5^{\circ} \mathrm{C}$ Elevation of site above MSL $\quad=250.5 \mathrm{~m}$ Effective gradient of the runway $\quad=0.25 \%$. VII. a) Explain imaginary surfaces with neat sketches.

Explanation

The answer provides detailed explanations for each part of the question, covering various topics in transportation engineering. The expressions for overtaking sight distance, maximum allowable speed, length of curve, and superelevation required are derived based on the given parameters. The IRC recommendations for maximum value of superelevation for highway pavements are also mentioned. The imaginary surfaces are explained with neat sketches.

Explanation

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