TABLE B-1-3.a. EFFECTIVE AREA SEEN BY THE IMP Angle (@) (degrees) Eff. of detector at midpoint of 6 Tan@ x2 (ft2) x(ft) Area of each interval (ft2) Areax eff. (ft2) 10 0.99 0.17633 4.28 57.6 57.6 57.0 0.0157 20 0.955 0.36397 8.84 245.8 188.2 179.7 0.0496 30 0.89 0.57735 14,02 618.4 372.6 331.6 0.0916 40 0.805 0.83910 20.39 1306.1 687.7 553.6 0.153 30 0.69 1.19180 28.96 2634.7 1328.6 916.7 0.253 60 0.54 1.7321 42.08 5565.0 2930.3 1582.4 0.437 3621.0 0.9999 Total * ” Int. Area x Eff. Total (Ratio) TABLE B-1-3.b. THE EFFECT OF A 10' WIDE ROAD Angle (8) (degrees) Eff. of detector set mid-pt. of 6 Tané 10 0.99 0.17633 x(ft) 4.28 Width of road=10' (ft2) Area of each interval (ft) 28.8 28.8 Total Area (ft2) Area x Eff. (ft2) Int. Area x Eff. Total (Ratio) 57.6 57.0 0.016 20 0.955 0.36397 8.84 88.4 59.6 119.2 118.6 0.033 30 0.89 0.57735 14.02 140.2 51.8 103.6 92.2 0.023 40 0.805 0.83910 20.39 203.70 63.5 127.0 102.2 0.028 30 0.69 1.1918 28.96 289.30 85.6 171.2 118.1 0.033 60 0.54 1.7321 42.08 420.50 131.2 262.4 141.7 0.039 629.8 0.174 Total