Available data:

• Crash
• Roadway Inventory
• Traffic Volume
• Interchange/Ramp
• Guardrail/Barrier

• Years Of Data Available:  1985-1997
• Average Crashes/Year:  145,000
• Roadway Mileage:  9,500

* Michigan data were last entered in HSIS in 1997. Since these data are not current, it is suggested that the user consider using other HSIS states if possible.