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CHAPTER 2: RANGE OF ALTERNATIVES 2.4 Alternative 3: Widen Considerations 1-90 in the Median, • Widening would occur within existing Reversible Lanes WSDOT right of way(median). • Median width would be decreased, Alternative 3 is based on an approach to add possibly interfering with current WSDOT flexibility to the 1-90 corridor by adding more maintenance strategies. lanes in the direction of traffic when at the times they are most needed.This alternative During non-peak travel times, reversible lanes could be offline or not operational. would add two new lanes within the existing I-90 median. The direction of the two lanes • Congestion in the non-peak direction would would change direction based on peak occur during the heaviest travel periods. demand (for example, Sunday westbound, • Access to the reversible lanes would be Friday eastbound).This alternative would limited to MP 70 and MP 85. create four lanes in the direction during the • Median barriers would delineate the new days/hours when traffic is heaviest. Access lanes. into the reversible lanes would occur only at • The alignment of the new lanes within MP 70 and MP 85 with potential intermediate the existing median would vary to access points. Additionally, opportunities for avoid impacts and also accommodate emergency service vehicles to exit at various constructability. locations would be provided. Interlocal traffic • This alternative assumes the replacement would generally not use the reversible lanes of all culverts and stream structures to the while long-distance commercial freight and current requirements for fish or hydraulic those looking to get through this section demand. without stopping would use this bypass route . Property impacts to Washington State during peak travel times. Department of Fish and Wildlife at MP 79.1 Existing lane widths on 1-90 would not change, due to realignment. nor would the existing outside shoulder.The • This option would not trigger the median would be used for the two new lanes, replacement of the Cle Elum River barriers from existing 1-90 lanes, and new Bridges 90/134N and 90/134S at MP 80.85. inside shoulders. Each new lane would be 12 An independent structure has been feet wide with new inside shoulders of 4 to 10 constructed previously in the median feet. Most of the land required for expansion is between the existing bridges (2022 Bridge located within the existing WSDOT right-of-way. Painting Project). Figure 2-3 presents the general alignment for • Widening towards the outside of the Alternative 3. Figure 2-6 shows a perspective existing roadway would still be required in cross-section of the proposed alternative. select locations where median width is not available. • Most existing bridges spanning over the 1-90 corridor would need to be replaced due to impacts to the center pier. VOLUME 1: FEASIBILITY REPORT 1-90 Corridor - Easton to Cle Elum Feasibility Study 1 16