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B. ENVIRONMENT <br />Nani Kailua Drive is a two lane collector road running mauka-makai through <br />the Kailua View Estates and Kona Heights subdivision. It meets Queen <br />Kaahumanu Highway Extension as a signalized intersection and continues <br />makai to its terminus at Hualalai Road. On the roadway section mauka of <br />Queen Kaahumanu Highway Extension, there are several intersecting local <br />streets (including Kakalina Street) and many residential driveways along the <br />length of the roadway. The pavement width is wide enough to accommodate <br />paved shoulders on both sides. There are no raised curbs but only a painted <br />stripe separating the roadway from the shoulder. The posted speed limit is 25 <br />miles per hour. <br />Vehicles could travel nonstop from Queen Kaahumanu Highway Extension to <br />the mauka end of Nani Kailua Drive before the four way stop was implemented <br />at Kakalina Street. The slope of the roadway is 8% in the vicinity of the <br />Kakalina Street intersection. The types of traffic calming applications that are <br />appropriate for this steep slope are generally limited to roadway narrowing and <br />possibly chicanes (putting horizontal curves on the roadway). <br />Kakalina Street is two lane local street generally running north -south. It <br />allows access to two roadways that parallel Nani Kailua Drive: Aloha Kona <br />Drive and Hoene Street. The location of the study intersection at Nani Kailua <br />Drive and Kakalina Street is shown on Figure 1. <br />C. DISCUSSION OF FOUR WAY STOP CONTROL <br />Four way (or multiway if there are not four incoming approaches) stop control <br />is an unsignalized intersection where all incoming approaches have a stop sign. <br />Thus, all traffic entering the intersection are required to stop. This type of <br />traffic control is generally used where traffic volumes on the major street (not <br />stop controlled approaches) and minor street (stop sign controlled approaches) <br />have increased to the level where the minor street traffic experiences excessive <br />delay. Multiway stop control can help reduce the delays on the side streets <br />9 <br />