Animate a dashed line

Is there a way to animate a dotted or dashed line to show a movement over a map? Like in this AfterEffect tutorial:
http://tv.adobe.com/watch/creative-cow-after-effects-tutorials/shape-tips-3/
Best regards
Claes G Andersson

Try the “Subtractive Animation Technique” as explained by “JK”…
He is using Toon Boom Studio, but the same technique can be applied in Animate…
http://www.animationcraft.blogspot.co.nz/2007/10/using-subtractive-animation-technique.html

Regards
Nolan