10.1 SR 08-01-2022 - Laserfiche WebLink

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HIGHWAY 10 CORRIDOR STUDY - FINAL REPORT Gap Analysis A gap assessment was completed to understand current gaps along Highway 10 to help determine if there are sufficient gaps to allow motorists from the side -streets to access and/or cross Highway 10. To complete this assessment, field observations were conducted to quantify the number and length of available gaps by direction. Based on this assessment, average westbound gaps vary from 3.4 to 7.7 seconds, and eastbound gaps vary between 3.7 and 5.2 seconds. This indicates there are limited gaps during the p.m. peak period for all movements in the westbound direction, but adequate gaps for all movements in the westbound direction during the a.m. peak period. In the eastbound direction, there are limited gaps during the a.m. peak period for all movements, while limited gaps for some movements during the p.m. peak period. Table 4provides a summary of the gap acceptance criteria used for this assessment. Note that Figurel5is an additional tool to help evaluate gaps from MnDOT's access management manual. This approach indicates that based on the volumes along Highway 10, there is a high risk of safety issues with any access along the corridor. Table 4. Gap Acceptance Vehicle Movement Left -Turn from Major Right -Turn from Minor 1-Stage Through on Minor 2-Stage, Stage 1 2-Stage, Stage 2 1-Stage Left -Turn from Minor 2-Stage, Stage 1 2-Stage, Stage 2 Source: Highway Capacity Manual Chapter 19 Other Operations Observations In addition to the operations analysis previously noted, other key corridor observations included: Figure 15. Gap Analysis 4000 400 3600 360 • Area landscaping can impact 3200 320 sight distance at a few locations. 2WO 260 • The horizontal curvature of the 2400 240 roadway can impact sight q 2000 260 distance at a few locations. y 1 160 • The traffic signal at 171st Avenue Y200 77D creates additional gaps in the wo W eastbound direction. 400 40 • Motorists on the side -streets A'NT VPH AADT 5.000 1pA00 15000 20. 000 25.000 experience significant delays GONF1iGTING VOLUME while trying to access and/or cross Highway 10. • Multiple vehicles were waiting in the median at one time, creating potential conflicts • Vehicles were using the shoulders as acceleration lanes to access Highway 10. Four -Lanes (Seconds) 4.1 6.9 6.5 5.5 5.5 7.5 6.5 6.5 OMDEO FOUR -CANE ROADWAYS (WITH WIDE MEMNS) "' AAOT 30,000 35.000 a GHW4�, Page I A �FRIOOR��