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A second important regular maintenance activity involves preventing roadway drainage from flowing onto the bridge timbers . The proposed alignments vary slightly at the west end of the roadway extension at West Ridge . The park 's major drawback is that it blocks all north / south roadway access for two miles between San Mateo and Wyoming Boulevards . These ramps will close to allow Washington State Department of Transportation crews to remove roadway signs and re-stripe the roadway west of the Sprague Avenue ramps . The exception is where a local public agency uses different lighting standards and ( a ) has existing lighting that is being replaced due to State highway construction , or ( b ) desires the inclusion of their roadway lighting into a State highway project .