This term I started from the LRC and headed east. I measured each column using a tape measure. Zero was the first gray post just barely visible on the left.
|time (s)||distance (cm)||v (cm/s)||a (cm/s²)|
There is a slight downslope at the start of the run, which gave me a very slight boost in velocity. The gain is only clearly visible in the data table. On a graph the data plots linear with a correlation coefficient r of 0.9997.
Plotting only the velocity and acceleration reveals the slight shifts in velocity.
At other locations I have taken the interpost spacing to be constant, but in this case the fourth post is a little long. The following table records the post-to-post distances. Not including the 320 cm interpost distance, the average is 305 centimeters - essentially exactly ten feet.