Skip to main content

Washington I-90 tolling could start in 2015

A planned Washington Department of Transportation (WSDOT) study could make tolling on interstate-90 bridges over Lake Washington and across Mercer Island all but inevitable. Tolling on the state route 520 floating bridge began about a year ago and transportation officials have been closely monitoring two factors: the routes that drivers are now using and the cost to replace the aging 520 bridge. In response, the state legislature last session asked for a new environmental study to review the affects of toll
January 2, 2013 Read time: 3 mins
A planned 451 Washington State Department of Transportation (WSDOT) study could make tolling on interstate-90 bridges over Lake Washington and across Mercer Island all but inevitable.

Tolling on the state route 520 floating bridge began about a year ago and transportation officials have been closely monitoring two factors: the routes that drivers are now using and the cost to replace the aging 520 bridge. In response, the state legislature last session asked for a new environmental study to review the affects of tolling on I-90 between interstate 5 and interstate 405.

“What we will be doing early in 2013 is studying the tolling of I-90,” said Craig Stone, assistant secretary for the WSDOT toll division.

A WSDOT-proposed time line of the study has planned public scoping meetings in early 2013 and a complete environmental impact study by early 2014, which could then allow approval of potential tolls in 2014. The state could then begin collecting the charge in 2015 or 2016.

The overall cost of the 520 replacement project is estimated at US$4.128 billion, a decline from US$4.6 billion, but the state still needs to find US$1.4 billion. Meanwhile, WSDOT's Stone said at a Mercer Island public meeting last month that congestion has increased on Interstate 5, Interstate 90 and State Route 522 as drivers avoid tolls on SR 520.

Traffic on I-90 has increased, on average, 13 percent over pre-520 toll levels, and I-90 travel times are three minutes longer on average during the peaks, said Stone. The state can't afford to come up with the rest of the money by asking the federal government for earmarks.  "The days of 90 percent of federal dollars coming in to finance highways in our state are basically over," he said.

WSDOT spokesperson Michell Mouton pledged that no decision has yet been made on whether or not to toll I-90. But the transportation agency must carry out the wishes of the state legislature, which s them to perform an environmental assessment and engage the public in communities that border Lake Washington.  "It's not just tolling for tolling's sake," she said. "We have to look at tolling on I-90 to help with the 520 floating bridge ... one affects the other. People will have the opportunity to engage and provide input to the study.  We're looking at tolling as a strategy."

Mouton also said that no decision had been made on changing access to high occupancy vehicle (HOV) lanes to and from Mercer Island, which currently allow single-occupancy vehicle access on the I-90 express lanes.

For more information on companies in this article

Related Content

  • Auckland considers road user charging to plug funding shortfall
    October 29, 2014
    Auckland, New Zealand, faces a US$9.5 billion transport funding gap to build the fully-integrated transport network set out in the 30-year Auckland Plan that includes new roads, rail, ferries, busways, cycle-ways and supporting infrastructure needed to cope with a population set to hit 2.5 million in the next three decades. If Auckland opts to pay for the fully-integrated Auckland Plan, Auckland Council officials claim the transport network congestion is expected to improve by 20 per cent over the next 1
  • Dual purpose for new weigh-in-motion site
    October 13, 2014
    A new weigh-in-motion weighbridge is being installed on State Highway 1 at the Rakaia Bridge to support the introduction of high productivity motor vehicles (HPMV) on this key South Island, New Zealand, freight route. The HPMV system allows vehicles carrying a divisible load of essential goods to weigh more than the official 44 metric tonnes without a permit, but only on specified routes.
  • Costing transit is complicated case
    August 19, 2015
    David Crawford welcomes fresh thinking from Canada. Public transit improvements can bring society “significantly more value” than conventional transport models normally indicate, argues Canadian researcher Todd Litman. “Traditional evaluation practices originally developed to assess roadway improvements, and focus primarily on vehicle travel speeds and operating costs. “They do not generally quantify or monetise basic mobility benefits, vehicle ownership and parking cost savings, or efficient land developme
  • Autonomous driving – what can we really expect?
    June 6, 2016
    Dave Marples of Technolution BV looks beyond the hype to the practical implementation of autonomous vehicles. Having looked at the development of this sector for some time, I am concerned about the current state of autonomous driving development as engineering (and marketing) have run way ahead of the wider systemic, and legislative, requirements to support an autonomous future.