The federal law being posted I believe pertains to a new hwy or ones built with Federal monies. If you read the state law it is easy to get out of a ticket.
Kinda close but,
all roads are maintained with federalmoney. Unless the prosecutor can prove that the road you were on did not receive one single cent of federal money they are bound by the federal MUTCD, and many states have simplyaccepted the federal MUTCD as their own guidelines (WI has done this)
The Purpose of the MUTCD is to make sure all signs and markings are similar from state to state. For instance you are driving on a 4-lane divided highway, the typical speed is 40 MPH, it is very rare that you will find one with a lwer speed limit, because the design of the highway was made for traffic traveling at that speed. then you find yourself in another state, on a 4-lane highway but it is marked at 25MPH, chabces are the speed limit is bogus and unenforcable under federal law.
Time to get into laser's yet?
What do you think the width of a laser beam is at 1500', Was it handheld? what is keeping that beam from sweeping other vehicles nearby and registering their speed instead of your own?
When was the last time the laser aiming device waschecked for accuracy at that distance? It may be off by 7-8 feet.
There is caselaw in New Jersey that laser speed detection must be limited to 1,000' or less and it has been succesfully used as a defense in other states. The LTI 20/20 is frought with errors and was the first and most popular unit out there for years, their use has fallen off though.
Radar, many states have mandated that an independent lab must verify calibration at least annually, check to make sure the unit used on you has undergone these independent tests, make sure the tuning forks used for the self test are the correct serial numbers for that radar unit, ask to see them in court, ask the witness to recite theserial numbers of the unti that belong with those forks, ask if he/she has personally verified they are correct, look for dings in the forksthat may throw off the frequency of vibrations. When was the last time the forks have been checked by an independent lab?
It is all about putting doubt into the evidence presented against you.
Some models of dashmounted radar will read the fan speed of the defroster, and they required a plate covering the defroster vents to read correctly. How close to the windshield is the radar antenna? How far away is the tuning for supposed to be from the antenna when used? how can the officer check calibration with the fork if he cannot get it in front of the antenna because the windsheild is in the way?