Part of my income is from being a Chemical Mowing Consultant to a Very Large ROW company that does our State and Local Hwy.
Proper ROW terminology would be Chemical Side Trimming the Line of road. There are several PGR on the market that do the job. Trimtect is the one we use. The AI is "Paclobutrazol". Yes it only stunts or controls growth on the side you apply it to.
You can lead a Donkey to water but you can't make the Jackass Drink
"As Americans you have the right to be stupid." John Kerry
"Life is tough, but it's tougher when you're stupid.” John Wayne.