Pavement Replacement Priority in Seattle Ali Boyum, Kayla Dantzler, John Mayfield, Derek Van De Wege

Overview Project Scope Area of Interest Data Collection Data Analysis Results

Project Scope Pavement near bus stops experience high stresses Metro is interested in replacing asphalt pavement with Portland Cement Concrete

Area of Interest

Data Collection 1.Pavement Near Bus Stops 2.Number of buses at each stop per day 3.Pavement Conditions 4.Pavement Types

Pavement Near Bus stops Buffer 50 feet along street

Bus Traffic Volumes At Stops Tabulated Bus volumes along each route from King County Metro Summed buses from each route for each stop

Pavement Conditions Using the PMPCI rating index (from )

Pavement Types Red- asphalt Blue- concrete

High Risk Areas Bus StopsPavement TypesPavement Condition

Analysis of Traffic Volumes With Pavement Conditions High priority areas are sections of road where all three high risk conditions overlap – More than the mean bus volumes at stops – Pavement condition rating below 50 – Sections of asphalt pavement Medium priority areas are sections of road where two of the conditions overlap Low priority areas are sections of road where there is only one of the conditions

Results Red – High Priority Blue – Medium Priority Green – Low Priority

Questions?