In modern days, society is entrusted with the responsibility of using one of the most accessible pieces of potentially dangerous pieces of machinery. With the rates of injuries and fatalities caused by vehicles continuously increasing, it has become the role of engineers to evaluate and improve the measures taken to prevent further damage. One major aspect of road safety is intersections, where the possibility of collisions is very high. 20% of all accidents occur within 100m intersections (K.W Ogden, 2001). The intersection that will be discussed in this report is the Broadwater Rd and Newnham Rd intersection at Wishart. This intersection is subjected to steep inclines and in some cases sight distance was largely hindered, resulting in a
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In this scenario, mgSinθ works against the applied braking force. Since the value of mgSinθ is directly proportional to the angle of inclination, more work or force acting over a distance is required to overcome it, therefore explaining the increase in stopping distance as the negative grade of a road increases. The downward incline scenario explored in Graph 2 is quite hazardous and if sufficient effective warnings of speed limits are not provided at intersections, sudden braking would be required. Sudden braking is unnecessary consumption of energy in most cases, and results in the loss of the vehicle’s kinetic energy as heat energy (Li M, 2009). Nowadays this is reflected in routes calculated by GPS’s in vehicles, as routes with high energy consumption including inclines are avoided. Hence a negative attitude is developed in the driver, towards steep roads (M, et al., 2014). Therefore, the intersection can be made more user-friendly by taking an approach where by the grade of the road is given primary importance in order to avoid sudden braking consequently reducing the amount of wasted energy.
Moving on, another concept relevant to this intersection is circular motion, which is in relation to safe cornering. When turning a corner, the net force acting on the vehicle is centripetal force, which is supplied by the friction between the road and tyres. This then supports Newton’s 1st Law of