Road Safety Audit for James Avenue NW and 250th Street NW, from the North Corporate Limits of Tiffin
Horizontal curve at 270th Street intersection
Start date: 09/01/10
End date: 11/30/10
Report: Road Safety Audit for James Avenue NW and 250th Street NW, from the North Corporate Limits of Tiffin (6.50 mb pdf) May 2012
Sponsor(s): Iowa Department of Transportation
About the research
To address safety concerns on James Avenue NW and 250th Street NW, from the North Corporate Limits (NCL) of Tiffin, north and east to I-380 (at North Liberty), the Johnson County engineer requested a road safety audit (RSA). The audit was conducted on September 1, 2010, through a program supported by the Office of Traffic and Safety at the Iowa Department of Transportation (DOT).
This road is a seal-coated roadway, about 25-ft wide, but with only about 0-1 ft of earth shoulders. According to 2006 Iowa DOT estimates, traffic volume is about 820 vehicles per day, north from Tiffin to a commercial entrance on 250th Street, then increasing to 2,990 vehicles per day to the on-ramp of Interstate 380 (I-380). Local traffic uses this road as a short-cut to Cedar Rapids, North Liberty, and the I-380/I-80 interchange (to avoid congestion on IA 965).
This report outlines the findings and recommendations of the road safety audit team for addressing the safety concerns on this roadway.