TRANSPORTATION ENGINEERING – II
(2008 Pattern) (Sem. – II)
Time :3 Hours]
Instructions to the candidates:-
1) Answer Q.1 or Q.2, Q.3 or Q.4 and Q.5 or Q.6 from Section – I and answer Q.7 or Q.8, Q.9 or Q.10 and Q.11 or Q.12 from Section – II.
2) Answer to the two sections should be written in separate books.
3) Figures to the right indicate full marks.
4) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed.
5) Assume suitable data if necessary.
6) Neat diagrams must be drawn wherever necessary.
[Max. Marks :100
SECTION – I Unit – I
Q1) a) Explain in brief the classification of Roads by Nagpur Road Plan.
a) What are the different causes of Traffic accidents? Discuss briefly?
b) Highlight the salient features of Bombay road development plan.
c) Write a short Note on Preparation of master plan.
Q2) a) Describe the following terms with respect to traffic engineer’s.
i) Road user characteristics.
ii) Spot speed studies.
b) Enlist the various road pattern’s and explain star and grid pattern in brief with sketch. 
c) Write an explanatory note on Highway planning Survey’s. 
d) Write a short note on traffic control devices. 
Unit – II
Q3) a) What is super elevation? Why it is necessary? State the minimum and maximum values of super elevation as per Indian road congress. \
b) Write a short note on : 
i) Grade compensation.
ii) Widening of pavement on Horizontal roads.
c) The speed of overtaking and overtaken vehicles are 70 and 40 kmph, respectively on two way traffic roads. If the acceleration of overtaking vehicle is 0.99 m/sec2. 
i) Calculate safe overtaking sight distance.
ii) Mention the minimum length of over taking zone (assume t = 2 sec).
Q4) a) Write a short note on Highway drainage. 
b) State clearly the difference between S.S.D. and O.S.D. and also enlist the various factor’s which influence on both distances. 
c) The radius of horizontal curve is 400 m, the total pavement width at curve is 7.6 m and the super elevation is 0.07. Design the transition curve length for a speed of 100 kmph. Assume pavement to be rotated about the inner edge. 
Unit – III
Q5) a) Explain these terms : 
ii) Modulus of Subgrade reaction.
iii) Radius of relative stiffness.
b) Describe briefly the various factors influences the pavement design. 
c) With the aid of neat sketches explain the design of joints in cement concrete pavement. 
Q6) a) Explain the Westergaards stress equations for wheel loads at all the three regions of cement concrete pavement. 
b) Explain the construction procedure of W.B.M. roads. 
c) Enlist the various tests for judging the suitability of road stones. Explain briefly the Aggregate crushing test. 
SECTION – II Unit – IV
Q7) a) Differentiate between : [3 x 2 = 6]
i) Apron and Hanger.
ii) Minimum Turning Radius and Minimum Circling radius.
iii) Runway and Taxiway.
b) Enlist the various Aircraft characteristics and explain any two in brief. 
c) The length of Runway under standard conditions is 2100m. The Airport site has an elevation of 270 m above mean sea level. Its reference temperature is 30°C. If the runway is to be constructed with an effective gradient of 0.20%. Determine the corrected runway length. Also, carryout the usual checks as per ICAO. 
Q8) a) Enlist the characteristics of a good airport layout. Draw a neat sketch of typical airport layout of single runway. 
b) Write short notes on any two of the following : [2 x 3 = 6]
i) Sketch showing the airport component parts.
ii) Factors which govern the site selection for an airport.
iii) Zoning Laws.
c) Explain the wind rose type – II with the aid of a neat sketch for orientation of runways. Also, state clearly the meaning of 
i) Wind coverage.
ii) calm period.
Unit – V
Q9) a) Derive an equation for economical span of a bridge. State the assumptions clearly. 
b) A bridge is proposed to be constructed across an alluvial stream carrying a discharge of 200m3/sec Assume Lacey’s silt factor equal to 1.0. Find the maximum depth of scour when the bridge consists of 2 spans of 40m each. 
c) Draw sketches of any two types of abutment and state the conditions under which they are recommended. 
d) Write a short note on requirement of traffic in the design of highway bridges. 
Q10) a) How do you determine the flood discharge by direct method. 
b) The normal velocity of flow in a river is 2m/sec. The normal, artificial waterway and the enlarged area upstream of the bridge respectively are 8000m2, 7000 m2 and 9000 m2. Determine the height of afflux using Merriman’s formula. Also find the increase in velocity due to afflux. Assume g = 9.81 m/sec/sec and Coefficient of discharge, C = 0.98. 
c) Write short notes on any two of the following : [2 x 4 = 8]
i) IRC class A type of loading.
ii) Cylinder pier.
iii) Loads acting on a bridge structure.
iv) Linear Waterway of a bridge.
Unit – VI
Q11) a) Define a bearing and state the purposes for providing bearings in bridges?
b) Write notes on [2 x 4 = 8]
i) Maintenance of bridges.
ii) Waterway of a culvert.
c) Draw the illustrative sketches of 
i) Suspension bridge.
ii) Bascule bridge.
Q12) a) Explain any two types of erection methods employed during construction of bridges. 
b) Differentiate between Fixed Span and Movable span bridges. Give one example each of fixed span and movable span bridge. 
c) Write a short note, along with a neat sketch, on a cable stayed bridge.
What do you mean by ‘Floating bridge? What are the advantages of floating bridge over fixed bridge.