write as neatly and completely as possible, and show all work Scenario An interstate is running through a relatively unpopulated area where a great deal of development is planned in conjunction with the relocation of a major employer to the area. As part of this development, the alignment of a nearby state highway, whose design speed is 60 miles per hour, is being redrawn to run through it and under the interstate. The area is somewhat hilly, and can be considered as suburban after the development is completed. The highway is expected to carry a traffic load of approximately 20,000 vehicles per day when it opens, with about 40% of vehicles expected to want access to the interstate. Traffic will be split evenly in each direction, about 10% of the traffic will be truck traffic, and traffic overall will grow at about 2% per year over the expected 20-year life of the highway. The material from the NYSDOT Roadway Design Manual is preferred for design, but you can use the other materials if necessary. Question #1 Using the AASHTO Method, determine the thickness of the asphalt surface course only. Assume 140,000 two-way first-year ESALS. Use the following to aid in your design: Reliability 90% | Overall std. dev. = 0.35 | Lane distr. factor = 0.90 Aggregate base (R = 70) | Elastic modulus of asphalt = 380,000 psi | Serviceability loss = 2.0 Question #2 If there are to be four lanes on the state highway (2 in each direction), what is best level of service that can be provided at the end of the design life? Assume no adjustments to free flow speed or volume are necessary, and about 16 percent of traffic traveling during the peak hour