For both the wheel track and the skip areas of the lines, the three different waterborne formulations generally reacted similarly, although variations approaching 100 millicandelas/[m.
In all the wheel track areas, regardless of paint type, and for the acetone paint skip areas, retroreflectivity decreased steadily until after the winter months, when it leveled off for the remainder of the year.
The other materials universally began to wear off the road sometime over the winter as indicated by the marked decrease in paint coverage in both wheel track and skip areas in May 2006.
Therefore, the skip area is a better predictor of how a line would hold up on a given road.
In contrast, the low temperature markings maintained skip area retroreflectivities just under 300 millicandelas/[m.
With regard to durability, the two waterborne paints showed similar wear in the skip area, while the low temperature waterborne markings were more durable in the wheel track region.
In fact, in the skip area of the 202 N test deck, none of the lines experienced a significant decrease in retroreflectance.
By the end of the testing period on the November 2005 I-80 E deck, in the skip area, low temperature waterborne paints had retroreflectivities around 275 millicandelas/[m.