CE 436/536 – ROADWAY DESIGN March 18, 2008

1. CE 436/536 – ROADWAY DESIGN March 18, 2008 • Review Remainder of Semester • Review Mid Term Problem #7 • Topics to cover this week: • Design project kickoff • Roadside Design Concepts • AASHTO Roadside Design Guide • Clear Zone Concept

2. Remainder of Semester • March 11 • Mid Term Review • March 18 • Review homework assignment • Roadside design • Clear zone concept • Roadside and median barriers • Fill and cut slopes • Begin Design Project • Establish project parameters and design expectations • Typical sections • Alignments • X-sections / Profiles • Superelevation • Quantity calculations / Cost estimate • March 25 • Spring Break • April 1 • Review project progress • Roadway drainage • Urban drainage design considerations • Rural drainage design considerations • April 8 • Review project progress • Fundamentals of traffic flow – Chapter 5 • April 15 • Review project progress • Capacity and Level of Service – Chapter 6 • April 22 • Present design project outcomes • Overview of Inroads roadway design software • Signalized intersections – Chapter 7 • Trip generation and traffic modeling – Chapter 8 • April 29 • Closed Week - Review of course materials • May 6 • Final Exam

3. Mid Term Exam Solutions Original #7 Solution

4. Mid Term Exam Solutions Modified #7 Solution

5. Mid Term Exam Solutions Modified #7 Solution I will not be re-grading the tests as a result of this, as it is all relative and for most of you it would be a bad thing. If you think you solved it correctly see me to review it. The solution in the text was wrong (I think), and I am going to notify the authors to see what they say.

6. Design Project Kickoff Purpose of Design Project – to provide you with an opportunity to design a roadway using the concepts you have learned. Goals of Design Project – become familiar with selecting design standards, routing an alignment that is efficient and cost effective, produce 3-D drawings that describe your design, and summarize your effort through preparing a cost estimate and writing a design narrative. Last week we chose teams for the project. They are as follows: Greydon(C)Venky(C)Anisa(C) KrisAllamMartin Gretchen SwarupValeriya The team captains are designated by a “C”. Captains are really nothing special, but I thought each team should have one?!

7. Design Project Kickoff • Design Products – with the givens you have you will prepare the following: • Horizontal alignment showing all tangent, curve, and superelevation information • Vertical alignment (profile) showing all tangent and curve information • Typical section drawings • Cross-sections showing earthwork, and clear zone design/issues • Summary of quantities for major items • Cost estimate for construction using quantity summary for pavement, aggregate base, and earthwork • Design narrative/report summarizing your design methodology, standards, etc. • I would like you to use a CAD drafting program of some type if possible – let’s talk about this – do you have access to CAD? What kind???? • I can post the electronic version of this mapping on the Mosfet site if you can use it?

8. Design Project Kickoff Given Information: Design a highway with two lanes in each direction and appropriate shoulder widths (AASHTO) Posted speed is to be 45 mph The anticipated volume on this highway will be 8000 vehicles per day The asphalt will be 6 inches thick and the aggregate base material will be 12 inches thick A subgrade geotextile will be used Clear zone should comply with the Roadside Design Guide Chapter 3 for the given design speed Where clear zone can not be met due to extreme terrain, consider guardrail or barrier or a combination of the two Keep environment in mind while designing

9. Design Project Kickoff Given Information: Design a highway with one lane in each direction and appropriate shoulder widths (AASHTO) Posted speed is to be 45 mph The anticipated volume on this highway will be 8000 vehicles per day The asphalt will be 6 inches thick and the aggregate base material will be 12 inches thick A subgrade geotextile will be used Clear zone should comply with the Roadside Design Guide Chapter 3 for the given design speed Where clear zone can not be met due to extreme terrain, consider guardrail or barrier or a combination of the two Keep environment in mind while designing Let’s review the mapping and talk more about what to do

10. Design Project Kickoff

11. Design Project Kickoff

12. Design Project Kickoff

13. Design Project Kickoff Recommended Schedule: By/during 4/1 class recommend having the horizontal alignment pretty much selected and typical section(s) drawn up. By /during 4/8 class recommend having vertical alignment (profile) finalized and drawn. By/during 4/15 class recommend having the cross-sections nearly completed. Modifications to the typical sections may be needed depending on what you find with your cross-sections. By the 8/22 class recommend have the quantities calculated, cost estimate completed, and design narrative completed for the presentation.

14. Design Project Kickoff • What else do you need from me to feel you can get started? • An example of how I would approach the topography? • An example of how to draw profiles and cross-sections off of the contours? • We will talk about estimating quantities in a future class. • ?

15. Roadside Design Concept Overview of Chapters 1, 2, and 3 from AASHTO Roadside Design Guide (RDG). Scans of these chapters are on the Mosfet site. Let’s look at some examples of clear zone that will apply to the 45 mph and 800 ADT parameters of your design project.

16. Spring Break Thank you for putting up with a new professor. I have enjoyed the experience so far. Have a great spring break and I’ll see you on April 1st Homework is to get started on the design project and please feel free to contact me with questions about the project anytime at marneson@hbh-consulting.com or 208-569-9595.