On Fri, 11 Feb 2005 05:49:49 -0500, Vinnie S.
wrote:

On Thu, 10 Feb 2005 21:25:37 -0800, Paul Johnson wrote:

Vinnie S. wrote:

So is driving 56 mph in a 55. But I am sure you have never done that.
Hypocracy at it's finest.

Depends on the state. Most states give you 10% leeway for differences in
speedometer calibration.

No they don't. The speed limits signs or laws do not say 55 or 65, +/- 10%.

That is nothing more than the descretion of the cop that tickets you.

That depends on the state. Some states (I believe Maryland is one)
have what they refer to as "Zero tolerance" 65 MPH. They can bust you
for 66, or so I've been told. I don't know how many cases have been
fought over speedometer or other potential speed inaccuracies and how
well the "zero tolerance" aspect has held up.

Most car speedometers are not so accurate that a 1 MPH difference is
all that hard to believe. Just putting one size larger tires on your
car can make that difference.

People have fought a speeding ticket on this basis and have won.
That's part of the reason why Pa. gives some leeway. Most cops don't
want to have to appear in traffic court when the chances are good the
case could get thrown out. However, it's a lot harder to make a case
for speedometer inaccuracies when you're 10 MPH or more over.

Dave