# HW5 - The University of Texas at Austin Chandra Bhat Dept...

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The University of Texas at Austin Chandra Bhat Dept of Civil, Architectural & Environmental Engineering Fall 2016 CE 321 Transportation Systems Homework Assignment No. 5 Roadway Characteristics and Design Date distributed: November 1, 2016 Due date: November 8, 2016 l. A highway horizontal curve has been designed for 60 mph with a superelevation rate of 0.10 feet per foot. The safe coefﬁcient of sliding friction fside is related to the speed V (in mph) with which a vehicle is negotiating the horizontal curve by the formula fside : 0.19 ~ 0.001V.) a) Determine the degree of curvature of this curve b) Ten years after this curve has been laid out, the pavement surface is overlaid and in doing so the superelevation rate has been altered to 0.08. What is the maximum safe operating speed on this curve after the overlay? 2. A horizontal curve on Lakeshore Drive in Chicago had a radius of 306.33 feet, which restricted the maximum speed on this section of the road to only 60% of the design speed of the highway. The need to suddenly reduce speed at this section caused several accidents. The local transportation authority decided. a few years back to improve the curve so that the maximum speed on the section would be equal to the design speed of g the highway. What had to be the minimum radius of the improved curve? Assume the 1 same relationship between the coefficient of side friction and speed on the horizontal : curve as in the previous question. Assume the superelevation rate of the old and improved curves to be 0.08. ...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern