Abstract
The purpose of the study is to analyze the operation of dual right-turn lanes in the Sacramento area. Right-turn turning movement counts, along with right-turn lane length and downstream condition data, were collected at a dozen intersections in the city and county of Sacramento. The utilization of each of the right-turn lanes was analyzed in relationship to the overall right-turn volume, second right-turn lane length, and the downstream conditions to determine the effects of these three characteristics on the utilization of each of the right-turn lanes. The results showed that on average the first right-turn lane was utilized only by 35% of the drivers. Consequently, the second right-turn lane was used about 65% of the time. The overall right-turn volume was found to be a major factor affecting the utilization of the individual lanes; whereas, the length of the second right-turn lane, and the distance to the nearest intersection downstream had no significant relationship to the utilization of individual right-turn lanes.