align windows and pipe markings
please align the markings better. this is the same pipe but you see one arrow and three arrows. at first glance you might mis read this. because the window is corrupting it.
why not
speed:window:speed on 3 or wider pipes
speed:window on 2 wide pipes
speed:1 wide pipes
speed is colored by pipe contents.
done in quadant pairs.
the solid line of direction is good too. it runs on a different quadrant pair
for 2 markings and 2 directions stenciled around each pipe section.