rolling or full stop from an intersection that has blind spots in WA state

Cautiously after a full stop (not a rolling CA stop). Remember if the cross street has no stop signs traffic on that street has the right of way.

In the State of Washington, if there are only two stop-signs at a four-way intersection, traffic at either sign must stop before proceeding to enter the intersection (with no stop signs, yield to traffic on the right, but don't expect other drivers to know this). Blind spots pose serious traffic hazards, and the only legal way to proceed is with caution; however, from a safety standpoint, you may wish to consult a traffic engineer for the city or county where the roadway is located if you feel the roadway is unsafe. There are several roads that are still unsafe even with the addition of certain traffic control devices, but certain markings might make a particular stretch of roadway safer by mitigating the risk of a serious hazard. Creating a paper trail of traffic hazards for elected and appointed officials will be your way of explaining that these officials had notice of a hazard when a collision resulting in serious injury or even death occurs.