Basics of Transportation Engineering — Summer 2018

What are the advantages of road transport? Describe the various classifications of roads in India by Nagpur Road Plan.

What are the objectives of highway geometric design? Explain the various geometric elements to be considered in highway design.

Explain camber. What are the objects of providing camber? Discuss the factors on which amount of camber depends. Also Explain camber and show the various shapes of camber with the help of neat sketch. Explain in brief objectives to provide on pavement surface. also discuss factors on which amount of camber depends

Design the superelevation required to maintain the speed on a horizontal curve with a radius of 300 m on national highway. Safe limit of lateral friction is 0.15.

Calculate the minimum sight distance required to avoid head on collision of two cars approaching from the opposite directions on a highway at a descending gradient of %. In this case, Car ‘A’ is moving with a speed of 80 kmph, reaction time of driver is 2.5 sec, coefficient of friction of 0.75 and break efficiency of 80 percent. Similarly, Car ‘B’ is moving with a speed of 60 kmph, reaction time of driver is 2.0 sec, coefficient of friction of 0.70 and break efficiency of 70 percent.

What are the various tests carried out on bitumen? Explain ductility test and its significance.

Explain various types of failures in cement concrete pavements & their causes.

Enlist the various tests to be conducted on aggregates. Explain crushing value test for aggregate and its significance.

Design a new flexible pavement for a two lane undivided carriageway using the following data:

Design CBR value of subgrade = 4 %

Initial traffic on completion of construction = 300 cv per day

Average growth rate = 6 % per year

Table 2 is the Traffic volume data collected for the peak AM hour (9:00 AM to 10:00 AM) traffic count data for Path2 collected on 03-02-2018 on a weekend: Shantigram to Sarkhej (Two lane One Way). What is the composition of Traffic distribution and which of the particular vehicular group are major contributor for the Traffic congestion in this Path. Calculate the LOS for this path for 2018 and comment on the LOS achieved (Refer to relevant Tables presented in Appendix). Also, suggest a mitigation solution for improving the existing public transport system facility- Metro Rail Transport to improve from existing LOS to LOS C. If we assume each metro rail system of 5 bogies per trip which is equivalent to 50 PCU trips then calculate the number of metro rail trips for Path2? If a constant annual growth rate of 15% is assumed for this path. Estimate the future traffic volume for2 2025 and also calculate the LOS and comment in terms of Metro Rail Transport mitigation. Table2: Peak AM Traffic count for path2: Shantigram to Sarkhej. (Time: 9:00 to 10 AM), 03-02-2018, Saturday. Slow Moving Fast Moving Vehicle Vehicles Time Two Three Four L.C.V. H.C.V. Bus N.M.V. Others Wheeler Wheeler Wheeler 9:00- 9:15 9:15- 9:30 9:30- 9:45 9:45- 10:00

Explain in detail the “ASI” mitigation approach to tackle Transport pollution for creating sustainable Urban Transport Management System? Clearly mention the mitigation solution and how to Implement ASI policy in Indian Scenario?

List out any four Intelligent Transportation System Technologies and explain them in brief with a neat sketch?

List out any four Intelligent Transportation System Applications and explain them in brief with a neat sketch?

Explain Greenshield’s Macroscopic Stream model. What is the relationship in terms of Traffic parameters v, k and q. Plot the relationships. Also, mention the boundary conditions for determining optimal density and optimal velocity for maximum traffic flow?

For the following data on speed and density, determine the parameters of the Greenshield’s model. Also find the maximum flow and density corresponding to a speed of 30 km/hr. For the linear equation of the form : y = a + bx , coefficients and , K V (veh/k (km/hr

)1715 Compare the maximum flow obtained through Greenshield’s model with the maximum flow obtained in Q4 (a) by calculating Mean Square Error. Does the Traffic flow at Path2 of Vaishnov Devi circle follow Greenshield’s model comment accordingly?

Explain the philosophy of Macroscopic stream model development? Explain Greenberg’s Macroscopic, Underwood’s exponential and Pipe’s generalized model by comparing with Greenshield’s model? Mention the assumptions clearly?

Determine Speed Characteristics from a Set of Speed Data given for two wheeler3 vehicle class based on the spot speed studies carried out at Pashawnath Jain mandir, Ahmedabad. Table 7 (Appendix) shows the data collected on a Sub-arterial highway during a speed study. Develop the frequency histogram and the frequency distribution of the data and determine: