[LowOiL]

I may use this for the morons on Harleys who are thundering through the narrow dirt nature preserve paths near my house, making children and hikers jump into the bushes to avoid being hit.

You are probable dealing with 4 wheelers. Illegal hunters like to use my dad's property (400 acres) near a nice river on the mountain. They gain main entrance up a creek bed, so dad put him several boards submerged in the shallow waters with big nails in it. After replacing their wheels a few times, the 4 wheelers finally got the idea. But dad would never put a wire/ect across the path, too dangerous/deadly.

[Capriole]

You are probable dealing with 4 wheelers.

No. I keep saying this and no one on this forum believes me. I am dealing with large street bikes that have smooth road tires on them. I can count the wheels, and there are only two per bike!

Fortunately during a recent storm a big tree fell across the access path and I haven't had any trouble since. No bike can go over or around this.