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| Database Name | Description |
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| Hazardous Material Incident Reporting System (HMIRS) | HMIRS contains data on spills, releases, or other incidents involving hazardous materials during the course of transportation. All modes of transportation are included except pipeline and bulk marine transportation. | Profile | | Highway Congestion (Urban Mobility Study) | Provides annual estimates of driver-hours of delay, wasted fuel, congestion cost, and other mobility indicators for selected urban areas. | Profile | | Highway Performance Monitoring System (HPMS) - Core Data | Data on the extent, condition, performance, use, and operating characteristics of the nation's highways. | Profile | | Highway Safety Information System (HSIS) | Provides accident, roadway inventory, and traffic volume data for a select group of states: California, Illinois, Maine, Michigan, Minnesota, North Carolina, Utah and Washington. | Profile |
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