VASCAR , How accurate is it.

[Donstang86]

I worked late Thursday night untill 11:30PM. I was tired and going home and about a 1/2 a mile away from work and had a Springdale Police car pull me over. He said I was doing 43.4 mph in a 25 mph zone. That is total bullshit. I looked down at my speedometer and I was between 30-35 mph. I am thinking about fightiing the ticket. He used VASCAR and has calculations down as:

Miles timed = .0178
Seconds Timed = 1.47 seconds

Any idea how this is timed, how accurate or what?
I did not see any equipment anywhere in past speedtraps. Was the cop doing this with a stopwatch? Do I stand a chance in fighting the ticket? I explained to him I never had a ticket but he did not care. All he cared about was screwing me

For the record, I was in the Honda not the Mustang.

[Mark Aubele]

ALWAYS fight tickets, whether you think there is a chance or not. Be respectful, and more often than not they will at least give you a break on the points.

[wick]

They have a box in the car. They hit a toggle switch once you cross the first line. Hit the switch again when you cross the second line. It gives a trap speed. There is room for error. As Mark says, be respectful and polite. Generally you will get off with a fine and no points.

[Wolfpack Speed]

vascar is very inaccurate mainly because of the human error factor. this is why the day will come when local law enforcement other than pa state police will have some form of radar and eventually moving radar...

[coralcoupe1993]

I always get pulled over. Fight it, be nice. Goal should be to loose the points and pay the fine!

[89 vert]

Fight it! My buddy was a Springdale cop and I got a chance to ride with him one night, All they use is a hand held stop watch pre set to the distance of the lines they are watching. There is plenty of room for human error. Be polite and you'll get out of it.

[JC Turbo]

I am certified in Vascar/ Acutrack use. There is an error factor, but it takes a significant error to make a difference in your speed. When I get to work I will post the formula for the error factor. You can check it out and see how much of an error is needed to change the speed + or - 3 mph. After using the vascar/ acutrack the user will only time the cars he knows are over the speed limit, and he can estimate their speed very well.

Most Vascar/ Acutrak users will start with your front tires and end with your rear tires, therefore giving you the wheelbase of your car as a break. I am not saying that you were speeding, i'm only trying to help. Like the replies before mine say, request a hearing and ask for a reduction in the speed and points.

JC

[JC Turbo]

Ok here is the error factor.

error in feet x mph divided by feet in speed zone = mph.

if we use an error factor of 15 feet, which is a huge error, here is what your mph would be.

15 x 43.4 divided by 95 feet in speed zone = 6.8 mph diff. so your speed would be 36.6 which would still be over the 25 mph speed limit.

An error factor of 5 feet would make a difference of 2.2 mph.

If you want to figure out how Vascar or Acutrak calculates MPH here is the formula.

vascar distance X 3600 divided by time = mph

.0178 X 3600 divided by 1.47 = 43.59 mph

Hope this helps, if you have any other questions let me know.


John

[stieny]

Fight it. I got a 74.4 in a 40 reduced to 5 over and no points.

[u1arunit]

Ok here is the error factor.

error in feet x mph divided by feet in speed zone = mph.

if we use an error factor of 15 feet, which is a huge error, here is what your mph would be.

15 x 43.4 divided by 95 feet in speed zone = 6.8 mph diff. so your speed would be 36.6 which would still be over the 25 mph speed limit.

An error factor of 5 feet would make a difference of 2.2 mph.

If you want to figure out how Vascar or Acutrak calculates MPH here is the formula.

vascar distance X 3600 divided by time = mph

.0178 X 3600 divided by 1.47 = 43.59 mph

Hope this helps, if you have any other questions let me know.


John

Thanks for posting up the details John.

Now I can figure out just how much over the limit I can be and still claim equipment error. lol

[JC Turbo]

Thanks for posting up the details John.

Now I can figure out just how much over the limit I can be and still claim equipment error. lol

Not much over the limit ;)