If you crossed the newly-tolled State Route 520 the past few weeks without a Good to Go pass, it’s time to pay up.

The Washington State Department of Transportation sent 19,000 bills for drivers crossing the bridge. WSDOT officials said the number may seem high, but tolling equipment is prepared to send out as many as 40,000 bills per day on the bridge.

“The number of Good To Go drivers crossing the bridge has exceeded our expectations,” said WSDOT Toll Director Craig Stone. “Our goal was to have 50 percent of vehicles using a Good To Go pass, and thanks to our customers, we have surpassed that number. This past Friday, 70 percent of drivers had Good To Go! passes. While pay by mail is a great option for those who choose it, we would like to see more drivers saving $1.50 each time they cross the bridge rather than getting a bill in the mail.”

WSDOT is mailing the first toll bills to drivers who crossed the bridge between Dec. 29, 2011 and Jan. 4, 2012. The higher rate covers the extra processing costs required to generate each bill.

Drivers can pay their toll bill online, by phone at 1-866-936-8246, by mail or in person at a customer service center in Seattle, Bellevue or Gig Harbor. Drivers who use SR 520 at least once a month are encouraged to open a Good To Go account to save $1.50 in tolls each time when crossing in the future.

Current account holders received electronic statements in the mail last week that reflected their toll charges using the Good To Go pass or using Good To Go pay by plate. Drivers pay an extra 25 cents per crossing when using Pay By Plate.