If you’ve driven on I-5 in Lynnwood lately, you’ve undoubtedly noticed all the construction activity. WSDOT is building what’s known as a “braided ramp.”
The new ramp from SR 525 and I-405 to southbound I-5 will be elevated over a new off-ramp to 196th Street SW. From above, it looks like a braid. The idea is to separate merging traffic to improve safety and ease congestion.
WSDOT just created this animation to give you a better idea: