Exact change symbol for use in toll plaza signage.
Federal Highway Administration - MUTCD
2017-08-04
<a rel="nofollow" class="external free" href="https://mutcd.fhwa.dot.gov/pdfs/2009r1r2/part2f.pdf">https://mutcd.fhwa.dot.gov/pdfs/2009r1r2/part2f.pdf</a>