Problem 1 (20%) The Haddon Matrix is a used commonly used, two-dimensional model used to analyze safety through three phases of a crash (pre-crash, crash, post-crash). The matrix provides insight into the range of possible safety issues that may have led to the crash and helps engineers propose appropriate safety countermeasures. Pre-Crash Crash Post-Crash Haddon Matrix Human Vehicle Physical Environment Use the following crash to fill out a Haddon Matrix: A single vehicle crashed on I-84 west in Willington at 1:38pm in March of 2024. The weather conditions for that day were rainy, leading to wet road surfaces and poor visibility. The driver of the 2015 Dodge Charger was speeding when he lost control of the vehicle and crashed into the center median. The vehicle had "disabling damage" and the driver remained on scene until emergency services arrived. Investigators say that the vehicle had "bald tires" at the time of the crash. Additional crash information can be found here: https://patch.com/connecticut/stafford willington/balding-tires-blamed-crash-willington The location of the crash can be found here: https://www.google.com/maps/@41.9089297.- 72.271683,3a,75y,6.94h,81.18t/data=!3m7!1e1!3m5!1sDgpYWkRCCiZyrCz3G8Ba Q!2e0!6shttps:%2F%2Fstreetviewpixels nis com9/210/thumbnai19/2Eob client/2Dmon our tootila?/26/200009/26b9/2D600

Assuming that the expression: u = ue i, can be used to describe the speed-density relationship of a highway, determine the capacity of the highway from the data below using regression analysis. k (veh/mi) u, (mi/h) 43 50 38.4 33.8 53.2 42.3 31 Under what flow conditions is the above model valid?

Results of traffic flow studies on a highway indicate that the flow-density relationship can be described by the expression. q=uk- Uff2 kj If speed and density observations give the data shown below, develop an appropriate expression for speed versus density for this highway. (Use the following as necessary: k. Assume u is in mi/h and k is in veh/mi. Do not include units in your answer.) Speed (mi/h) Density (veh/mi) 57 16 53 28 45 40 40 59 28 69 21 89 17 98 Determine the density (in veh/mi) at which the maximum volume will occur as well as the value of the maximum volume (in veh/h). density at maximum volume maximum volume veh/mi veh/h

A flexible pavement at an access road to a sportsstadium parking lot is designed with a 4-inch sand-mixasphaltic concrete surface, 5-inch aggregate bituminousemulsion base, and a 10-inch crushed stone subbase.There are 95 scheduled baseball and football games atthe stadium per year. The access road to the parking lotis three lanes in each direction (conservativelydesigned). The pavement was designed for recreationalvehicles with one 20K single axle and one 20K tandemaxle. There are 9,000 recreational vehicles estimated ateach event. Given that drainage coefficients are 1.0, theoverall standard deviation of traffic is 0.45, reliability is90%, and the soil's resilient modulus is 15,000 lb/in2,how many years will the access road last if the initialPSI is 4.0 and the terminal serviceability index is 2.5?

How would you use the Central Limit Theorem in Civil Engineering? How would you use t-tests in Civil Engineering?

answer if true or false