U.S. Route 30 in Iowa
... that the 1920s cost of US$30,000-per-mile ($658,000-per-mile in 2010 dollars) was a major deterrent to the completion of U.S. Route 30 in Iowa?
... that the 1920s cost of US$30,000-per-mile ($658,000-per-mile in 2010 dollars) was a major deterrent to the completion of <b id="mwELc"><a href="./U.S._Route_30_in_Iowa" id="mwELg" rel="mw:WikiLink" title="U.S. Route 30 in Iowa">U.S. Route 30 in Iowa</a></b>?