Reduced speed warning sign at on ramp to northbound Interstate 55 from the Funks Grove Rest Area in Illinois, US. Sign shows cracking from age and does not comport with modern MUTCD in several respects, including brown background and lack of retroreflectivity.
<a href="//commons.wikimedia.org/wiki/User:Visviva" title="User:Visviva">Visviva</a>
<span class="int-own-work" lang="en">Own work</span>