Much of SDOT’s annual street maintenance work is now completed
With fall beginning and rain becoming more frequent, the Seattle Department of Transportation is winding down its annual preventative maintenance and street paving programs that require dry weather. Microsurfacing and crack sealing are the processes that are the most weather sensitive.
SDOT completed its second ever microsurfacing project this summer in the Arbor Heights neighborhood of West Seattle covering 26.8 “lane-miles” of residential, non-arterial streets. (A lane mile is one mile of a standard traffic lane.) Microsurfacing is a preventive maintenance treatment consisting of applying slurry of crushed stone and asphalt emulsion. This technique extends the life of pavement that is in good condition and keeps lightly traveled streets from deteriorating to the point where they require major rehabilitation. Before SDOT began microsurfacing, crews chip-sealed these streets, a process that leaves troublesome loose rock for a period after the work is done.