Question

A traffic signal control is being designed for an intersection on a divided highway with the characteristics shown in the table below. Determine an appropriate length of the yellow interval for each approach and how you will provide it. Assume the average vehicle length L is 20 ft, and the perception-reaction time ỗ is 1.0 sec. a is 1 1.2 ftSec2, g-32.2 ft/sec2 E-to-W Approaches 18 N-S Approaches Median width, (ft) 16 4 Number of 12 ft lanes on each approach Design speed, mi/h Grade 50 +3 40 0

Answer 1

Civen thot Length 2.0 ft O Sec 32.2t sec' inlsrval for N-oppro 40 hitと min hre dpercuption cons tant a-' acceleralion d

Ikrc .wse houe h. İd width 232 Ft Se min232 30 2 Cl 2 o) t 34a8 3 2812 -t 2 (tag) Io

width W(3 H3 18)+1 : 1818 18o O20 run 32 2 run ュ 6, 1335