"Quick access from east to west of I-5"
If you're at the SeaTac airport and you need to get to Southcenter Mall in a hurry, taking S. 178th Street might be quicker than Highway 518. Actually, from Pacific Highway/International Blvd./Highway 99 (same road, three names in this area for some reason), you'd take S. 176th St., which winds into S. 178th St. on the other side of Military Road. That's where it gets fun and pretty. Driving through tree-lined residential streets and ending with a steep drop down to Southcenter Parkway, you've reached the end of the road. Not literally, just the end of S. 178th St. It then turns into S. 180th St. Short road, fun ride.