09-22-25 - City Council Agenda - Laserfiche WebLink

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8 of 12 Local Residential Trip Travel Time Analysis The RIRO conflguration at Robinson Drive, Century Trail, and Palomino Lane will restrict left-turns movements, requiring drivers to use nearby roundabouts to make U-turns. A travel time analysis was conducted to assess the impacts of this conflguration on local residential trips affected by the RIRO conversions. Only the left-turns from the local roadways to Sunset Avenue were evaluated since they are larger in magnitude. 1. Robinson Drive • Morning outbound trips heading south will flrst travel north on Sunset Avenue, then use the roundabout at Main Street for U-turns. This route adds approximately 0.6 miles of travel distance but offers the most efficient travel time, with roundabouts projected to operate at LOS A. • Alternative local routes through Century Trail and Palomino Lane are available; however, these alternative routes include: • Compatible travel distances • Lower speed limits (20 to 25 mph) • Multiple stop signs • Longer travel times (up to 2 minutes) Figure 5 illustrates the primary and alternative local routes for morning outbound trips from Robinson Drive. 2. Century Trail • Similarly, morning outbound trips heading south via Sunset Avenue and a U-turn at the 121st Avenue NE roundabout add less than 0.3 miles of travel distance but result in the most efficient travel time. • Alternative local routes through Palomino Lane and Lilac Street are slower, with travel times up to 1 minute longer due to lower speed limits and multiple stop signs. Figure 6 illustrates the primary and alternative local routes for morning outbound trips from Century Trail. 3. Palomino Lane • Similarly, morning outbound trips heading south via Sunset Avenue and a U-turn at the 121st Avenue NE roundabout add approximately 0.5 miles of travel distance but will offer efficient traffic conditions with minimal delays. • Alternative local routes through Lilac Street provide travel times that are slightly less, which may result in some trips navigating the local system and accessing Sunset Avenue at Lilac Street. This route does require motorists to pass through multiple stop signs. The expected number of vehicles that would take the local route is less than 10 during peak hour conditions. Figure 7 illustrates the primary and local routes for morning outbound trips from Palomino Lane. Page 13 of 228