AndyPoms wrote:I looked it all up & I cited my sources (the little numbers in parentheses).jwriddle wrote:AndyPoms wrote:The lane guidance in other GPS units is done essentially by segment - it doesn't actually know what lane you are in, but information about the number lanes on the segment you are on.
Besides at a 95% confidence level, civilian GPS is only accurate to 7.8 meters (just over 25 feet)(1) - and minimum lane width in the US is 12 feet (2) so 25 feet covers two full lanes on either side.
You're a walking Wiki of stats.
Now you're just showing off.
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