Pavement Signage Examples?

In the past we have provided wall or post-mounted signage for the LE/FE preferred parking spaces (Option 1), but it appears that pavement marking alone would be sufficient for this credit. Does anyone have examples of or know what sort of text painted on the pavement would be acceptable to meet this requirement? I was thinking of something like the following. Do you think this would work (or be too much) to comply with this credit?: LOW-EMIT / FUEL-EFFIC VEHICLES ONLY Thanks for any help on this!