Page 107 - TransportationPlanUsetsGuide

In the interim, consistent with conditions for strategic protection of right-of-way for the southern arterial in
the I-5 to 99W connector study, Brookman Road has been designated as an arterial with 5lanes of right-of-
way. It is recognized that changing the role and function of Brookman Road would require modifications to
the Brookman Addition Concept Plan to determine how future development would occur. During the interim,
while refinement planning has not yet been completed, access spacing and other requirements will need
to be evaluated on a case by case basis at the time of any development application. The long-term intent is
to reevaluate the Brookman Addition Concept Plan in the context of the Urban Reserve designation to the
south. The evaluation would consider the refinement of both the location Southern Arterial, and a local col-
lector level roadway(s) to serve to the area. As the issues for the Southern Arterial are resolved (including the
long-term alignment) appropriate changes to these interim designations should be considered.

Short-term regional strategy

• Identify transit improvements, specifically east-west connections between Tualatin and Sher-
wood though TriMet’s Service Enhancement Plan.

• Upgrade existing streets to two lanes with turn lanes, traffic signal timing, bicycle lanes and
sidewalks, including Herman Road, Tualatin-Sherwood Road, and 95th Avenue.
• Add a lane to the southbound I205 to southbound I5 interchange ramp, extend the acceleration
lane and add an auxiliary lane on southbound I5 to Elligsen Road.
• Conduct more detailed project planning and begin construction of a two-lane extension of SW
124th Avenue from Tualatin-Sherwood Road to Grahams Ferry Road.
• Improve the intersection of Tonquin Road and Grahams Ferry Road.
• Continue Intelligent Transportation System improvements along Tualatin-Sherwood Road. ADOPTED TEXT

• Conduct more detailed planning to meet all the conditions placed in the proposed Southern
Arterial, including:

› Conduct the I-5 to South Corridor Refinement Plan (includes I-5 from Portland to Tigard, I-5 from
Tigard to Wilsonville and OR99W from I-5 through Tigard and Sherwood). Local jurisdictions will
develop land use plans for areas recently added to the urban growth boundary. These planning
efforts will include opportunities for further public participation and input.
› Conduct a more detailed planning study on a potential Southern Arterial. This study will include
impacts on existing development and the natural environment to refine the design and alignment
location. These detailed planning studies will consider impact mitigation and coordinate with land
use and transportation plans for the area. The studies will also include integration with land use
plans for UGB expansion areas and Urban Reserves. The studies will consider access between I-5
and a southern arterial and the potential for the preferred alignment to address any conditions
associated with land use goal exception appropriately for the southern arterial. These planning
efforts will include opportunities for further public participation and input.

In the recommended alternative, Tualatin-Sherwood Road is sized based upon the expectation there will be
a Southern Arterial. Due to insufficient capacity, it is expected that Tualatin-Sherwood Road cannot meet
regional mobility goals without the Southern Arterial. Further expansion of Tualatin-Sherwood Road is incom-
patible with the plans for both the Tualatin and Sherwood Town Centers. If the southern arterial is removed
through future studies, there will be a significant unresolved mobility issue addressing east-west travel
through this area – with resulting impacts on employment and economic vitality.

PART 3: TRANSPORTATION MODAL ELEMENTS 91
Effective November 27, 2015 • Updated December, 15 2016