HW1BBaseline Control Traverse-1

HW1BBaseline Control Traverse-1 - 1 170 200 ft 1 BP 2 215...

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SUR 4201 HW1B Baseline Control Traverse The first step in a route design project is to precisely determine the location of the Begin Project BP and End Project EP points. Also, the boundary and features of the "corridor" must be mapped. The corridor is the broad band of land within which the new road must lie. Usually, a new road also connects with existing pavement at the Begin and End Project. This pavement has existing direction that must be matched by the new road. A baseline control traverse is run through the corridor to measure these things. Given: Existing pavement at an azimuth of 90 degrees (N 90 E) comes into the B.P point, which is assigned cartesian coordinates of 10000N/10000E. Az 90 deg 1 BP 10000N/ 2 10000E Az 80 deg 3 EP A traverse is run along the perimeter of the corridor (assume straight corridor limits for the new road's baseline). Point Backsight Foresight CW angle Dist to foresight BP pavt. CL
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Unformatted text preview: 1 170 200 ft 1 BP 2 215 350 2 1 EP 210 250 EP 2 3 280 200 3 EP BP 245.2 deg 623.8 Assignment: 1. Check your measurements for blunders by computing a closure for the traverse. Compute the LEC (Linear Error of Closure), and the REC (Relative Error of Closure ratio). If this is 1/5000 or better you don't have any major measurement blunders, then balance the traverse by the Compass Rule to force the traverse to close. 2. Compute the N/E of two "pavement points" -- one point 100ft before the BP on the existing incoming pavement and one point 100 ft after the EP on the outgoing pavement. 3. Make a chart in excel of the traverse cartesian coordinates and the pavement points. Submit: 1. A single Excel file containing (a) a text box where you "talk to me" and give a summary of your results and observations, (b) your calculations, and (c) an Excel chart of your cartesian coordinates....
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