What high-tech street surveying has done for Spokane’s roads | Washington

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(The Center Square) – The City of Spokane has gone high-tech in its survey of 2,200 miles of street lanes to plan maintenance and repair projects.

According to city officials, what once took three years with seasonal workers physically patrolling the streets is now done by Transmap vehicles.

One of these vehicles can cruise the streets of Spokane, Washington’s second most populous city, and gather enough information to guide planning in less than two weeks.

The city reports the benefits of Transmap as reduced risk for street crews and the availability of consistent information to develop the six-year transportation plan.

Transmap collects data with cameras and lasers on various pavement defects along the stretch of pavement.

This information is fed into the city’s pavement management system, where a score is calculated to guide the priority of projects. Streets are rated on a scale of 0 to 100 using a pavement condition index.

The system also keeps track of historical maintenance and rehabilitation projects, as well as specific road data such as length, width and thickness.

The City performs Transmap inspections every two years for main thoroughfares and every four years for local accesses or residential streets.

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