I have never looked at the speedometer where driving in reverse because I have my head turned so I can look out the back window so I can see where I 'm going. In a message dated 8/16/02 2:21:06 AM EST, snapper@st-abbs.fsnet.co.uk writes: > And wondering why my car's speedometer > > doesn't indicate negative speed when I'm driving in reverse, or is that > > driving forward in the opposite direction? > That's because speed is a scalar quantity - it has magnitude but not > direction. > Mmmm ... I know quite a few photographers like that ;o)