| CPC G08G 5/0069 (2013.01) [G06V 20/17 (2022.01); G08G 5/0091 (2013.01)] | 20 Claims | 

| 
               1. A method of controlling a vehicle comprising: 
            propagating a photon beam along a beam propagation path through a medium; 
                monitoring, with a vehicle-mounted sensor, intensities of off-axis photons that are scattered by aerosol particles in the beam propagation path; and 
                maintaining the vehicle within a vehicle path based on monitored off-axis-photon intensities, wherein the vehicle path is offset from, and parallel to, the propagation path. 
               |