 The I-5 and SR 529 interchange in Marysville is planned to be expanded in 2022 with the addition of two ramps and a roundabout that would provide complete access in all directions.The project would also provide traffic to Marysville with a bypass of the congested SR 528 corridor, which is often blocked by trains.SR 529 also has a long spur route in Everett that extends from SR 529 to (I-5) northbound, numbered exit 194.