Where to get Official Speed Limit Info

Dane,

Thanks for the detail info.

At the time, I was alone (i.e. no witness), how much is this gonna
hurt?
Also, how do I know if the officer used any radar unit? What would the
defense be if, say, he used pacing instead?

Would photos be something usable (problem is how to link speed limit
signs
with street name or location, as they don't normally show up close
together).

Raymond