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3. A level loop was run starting at BM 20 and going clockwise around the loop shown below in Figure 2. The given known elevation of BM 20 is 1418.013 ft. When closing the level loop, BM 20 was found to have an elevation of 1417.890 ft. (a) Adjust the elevation of each station to correct for error. Show sample calculations of your work. (b) What is the accuracy ratio of the survey? BM 20 Elev. 1418.013 2.3 mi BM 20A Observed Elev. 1234.567 2.7 mi 1.6 mil 0.9 mi BM 20B Observed Elev. 1357.913 BM 20C Observed Elev. 1396.963

3. A level loop was run starting at BM 20 and going clockwise around the loop shown below in Figure 2. The given known elevation of BM 20 is 1418.013 ft. When closing the level loop, BM 20 was found to have an elevation of 1417.890 ft. (a) Adjust the elevation of each station to correct for error. Show sample calculations of your work. (b) What is the accuracy ratio of the survey? BM 20 Elev. 1418.013 2.3 mi BM 20A Observed Elev. 1234.567 2.7 mi 1.6 mil 0.9 mi BM 20B Observed Elev. 1357.913 BM 20C Observed Elev. 1396.963

Traffic and Highway Engineering
Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter14: Highway Surveys And Location
Section: Chapter Questions
Problem 5P
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3. A level loop was run starting at BM 20 and going clockwise around the loop shown below in Figure 2. The given known elevation of BM 20 is 1418.013 ft. When closing the level loop, BM 20 was found to have an elevation of 1417.890 ft. (a) Adjust the elevation of each station to correct for error. Show sample calculations of your work. (b) What is the accuracy ratio of the survey? BM 20 Elev. 1418.013 2.3 mi BM 20A Observed Elev. 1234.567 2.7 mi 1.6 mil 0.9 mi BM 20B Observed Elev. 1357.913 BM 20C Observed Elev. 1396.963
Transcribed Image Text:3. A level loop was run starting at BM 20 and going clockwise around the loop shown below in Figure 2. The given known elevation of BM 20 is 1418.013 ft. When closing the level loop, BM 20 was found to have an elevation of 1417.890 ft. (a) Adjust the elevation of each station to correct for error. Show sample calculations of your work. (b) What is the accuracy ratio of the survey? BM 20 Elev. 1418.013 2.3 mi BM 20A Observed Elev. 1234.567 2.7 mi 1.6 mil 0.9 mi BM 20B Observed Elev. 1357.913 BM 20C Observed Elev. 1396.963
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