Prices are forecast to reach their highest level for the holiday weekend in four years.
The 28-year-old suspect made his first court appearance on Friday.
The crash sent a second driver to the hospital.
WSDOT said alternating one-lane traffic is not possible because some sections are gone.
A daytime lane closure for southbound travelers is scheduled for Thursday.
Changes could take effect starting this summer.
Friday, May 15, is the final day to buy WTA’s 92-day passes.
The suspect was booked into the Whatcom County Jail on six separate charges without bail.
A proposed tax levy to fund the Whatcom Chief’s operation will be voted on in late July, with residents encouraged to weigh in ahead of the vote.
Crews are conducting around the clock emergency repairs on two separate stretches of the highway.