The NUTCD recommendations to the FHWA concerning Shared Land Markings (Chevrons) can be found here: http://members.cox.net/ncutcdbtc/sls/slmtoncjan07.pdf
Fortunately, Pittsburgh is one of the cities which has been allowed to install chevrons as a Federally approved experiment on State roads so we have a good example close to home. If you look at the NUTCD recommendations there is no mention of a requirement for signage. So I am wondering why the WV MUTCD committee thinks this is necessary? Also, if you look at the MUTCD site, http://mutcd.fhwa.dot.gov/knowledge/natl_adopt_2000_2003.htm , you will observe that WV accepted all the MUTCD except for part 6 "Temporary Traffic Control." The MUTCD, itself, recommends that signage not be overused in relation to road markings. WV DOH should be looking at what Pittsburgh is doing and what the NUTCD recommends, in fact, in WV's own TEP (Traffic Engineering Directive) at http://www.wvdot.com/engineering/Manuals/Traffic/TED/TED210.pdf it says "It should be emphasized that it is not the intent of such signing to convey the message that the roadway contains any feature, exclusive lane, or other characteristic specifically designed to accommodate a pedestrian, horse, or bicycle."
-Jonathan