I agree with the above.  My parents just went through the same issue with
their early 90's Acccord.  Although the dealer service dept was told that it
was an intermittent problem (many times a day), they some how diagnosed it
as a bad odometer/instrument cluster.  They claimed they never saw a bad VSS
before. But since the cruise control would also cut out whenever the speedo
dropped out, I assumed it was the VSS.  Also, the auto tranny D4 light
started to come on/blink.  Apparently the transmission couldn't understand
why it was in higher gears, but going 0 mph!

Sure enough, replacing the VSS  a few weeks later cured all the problems.
J.