transportation safety characteristics of washington’s interstate 90
DESCRIPTION
Transportation Safety Characteristics of Washington’s Interstate 90. Presented by: Tom Abbott & Aaron Hulst. Data Used to P erform Analysis & Project M aps. WSDOT Interstate Polylines Cities Layer Accident data Precipitation Raster Elevation layer Coastline Layer USGS Landslide data. - PowerPoint PPT PresentationTRANSCRIPT
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Transportation Safety Characteristics of Washington’s
Interstate 90
Presented by:Tom Abbott & Aaron Hulst
![Page 2: Transportation Safety Characteristics of Washington’s Interstate 90](https://reader035.vdocuments.us/reader035/viewer/2022081514/568160cb550346895dcffd45/html5/thumbnails/2.jpg)
Data Used to Perform Analysis & Project Maps
• WSDOTo Interstate Polylineso Cities Layero Accident datao Precipitation Rastero Elevation layero Coastline Layer
• USGSo Landslide data
![Page 3: Transportation Safety Characteristics of Washington’s Interstate 90](https://reader035.vdocuments.us/reader035/viewer/2022081514/568160cb550346895dcffd45/html5/thumbnails/3.jpg)
Accident Density by MilepostAnalysis
• Accident Density• Greatest density occurs around metropolitan areas • High accident density over Snoqualmie Pass
• Analysis of Results• Pass accident density is due to increased elevation
and high precipitation as snowfall• Metropolitan accident density is due to high traffic
volumes
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Accident Density by Milepost
Recommendations• Recommendations• Safety measures should be taken by WSDOT to
alert drivers to hazardous conditions
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Analysis Tools Used In GIS
• Dot Densityo Located Accidents by Milepost
• Select by Attributeso Created I-90 feature
• Buffero To find cities within 2 miles of I-90
• Intersecto To find cities within 2 miles of I-90
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Accident Density by Milepost Map
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Accident Data by Milepost
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Accident Density & Precipitation
![Page 9: Transportation Safety Characteristics of Washington’s Interstate 90](https://reader035.vdocuments.us/reader035/viewer/2022081514/568160cb550346895dcffd45/html5/thumbnails/9.jpg)
Landslide Hazard AreasRecommendations
•Hazard Areas- East of Issaquah- Isolated stretches through Snoqualmie Pass
• Recommendations- Proper construction such as retaining walls
should be constructed along these stretches of I-90 to secure landslide hazard areas
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Analysis Tools Used In GIS
• Buffero 200 ft around both past landslide areas and I-90
• Intersecto Determined where both buffers intersectedo Results determined Landslide hazard areas on I-90
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Landslide Buffers on Interstate 90
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Thanks for listening. Any questions?