No, it isn't legal. Look up Impeding Traffic. You aren't allowed to impede the normal flow of traffic, even if that traffic is violating the law.
Impeding Traffic varies from state to state. In Missouri, for example, drivers in the left lane must move faster than drivers in the right line (assuming both lanes are for the same direction); but only up to and including the speed limit. If the driver in the left lane is at the speed limit, and the driver in the right lane is exceeding the speed limit, the right-lane driver is violating the law while the left-lane driver is obeying the law.
This is valuable stuff, now that it has a market use. And to think that I wrote it off as waste and was just pissing it away.
If successful (and mass-producible), this could be like the polio vaccine.
It won't be like the Polio vaccine unless:
1) It is introduced after Malaria is already all but eradicated due to better hygiene and sanitation.
2) It takes credit for the former.
Truly simple systems... require infinite testing. -- Norman Augustine