# Traffic Engineering Applications in Geometry

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Traffic Engineering: Applications in Geometry Subject: Geometry Grade Level: 9-12 Duration: 2-3 Class Periods Overview: This lesson relates basic geometry concepts such as intersection of lines, perimeter and area of plane figures, ruler postulate, angle postulates, bisectors, and Scale factor to the real world application of road way and intersection design. Rational: This lesson relates to engineering because it requires students to discover characteristics of existing road ways and use this knowledge to design a network of their own. The students proposed road designs relate directly to traffic engineering by requiring them to think about the design issues such as lane width, queue storage lengths, signal timing, etc. Activity Summary: Using Kinesthetic, visual, logical and oral skills students will understand the relationship between transportation design and traffic patterns. Students will investigate an existing intersection and apply the information gained to design their own network. Objectives/Goals: • Students will understand how geometry applies to basic concepts of transportation design. • Students will Measure the lengths and widths of different lanes • Students will determine the total area covered by the intersection including and excluding any medians using real world dimensions • Students will Convert the measures into real world dimensions using the scale factor • Students will determine the total possible (real world and scale)dimensions for placing a sidewalk corresponding to the sides of the intersection • Students will construct parallel and perpendicular lines to form an intersection. • Students will use geometric concepts to design a traffic network. • Students will critically analyze reasons for problems and formulate potential solutions using technology to present their findings.