Signs that say how fast you are going?

Question

where are some located on the highways in the twin cities? I wanna test my speedometer with my safe quality- larger size snow tire rims

thanks!

Answer 1

Changing tires won't usually throw the speedometer off my more than a couple, not enough to get upset over. Those signs may or may not be close to accurate.

Answer 2

Those aren't necessarily accurate. They will likely read high
to influence drivers to slow down. The most reliable way is
to use time over a measured distance like interstate mile
markers. It should take 60 seconds to go 1 mile at 60mph,
or 55 seconds/ 1mi/ 65mph, or 52 seconds at 70mph, or
120 seconds at 30mph. Use the algebraic distance formula
D=RT (Rate= distance/time) watch your units of measure.

Answer 3

call the minnesota highway patrol in golden valley. they should be able to give you some kind of an answer.

Answer 4

i think highway 61 has one