The SR 520 Legislative Workgroup considered the following westside design options:
|$2.027B to $2.127B||$4.531B to $4.631B|
|$2.022B to $2.298B||$4.526B to $4.802B|
|$4.070B to $4.168B||$6.574B to $6.672B|
|$2.562B to $2.642B||$5.066B to $5.146B|
The upcoming SR 520, I-5 to Medina: Bridge Replacement and HOV Project Supplemental Draft Environmental Impact Statement (SDEIS) analyzes three westside design options, A, K and L, each with sub-options.
The Option A+ recommendation is comprised of Option A with specific sub-options and is covered in the SDEIS.
While Option M also includes a tunnel underneath the Montlake Cut, it would require a different construction method than Option K, and is not covered in the SDEIS.