Unusual Exit Numbers

[wanderer2575]

The only directional suffixes (suffices?) I ever saw in Michigan may have been an error.  It was on the M-10 Lodge Freeway's partial interchange at Southfield Road/Freeway when signs were replaced as part of the M-10 reconstruction in 2007.  The N (northbound) and S (southbound) suffixes lasted until only a week or so after the freeway was reopened, to be replaced with 14C in both directions.