I can’t believe that there would be zero vehicles on virtually the entire western section of the M25 in daylight hours, even in lockdown 1.
I took a photo off a footbridge over the M4 at Reading, middle of the day, not a single car. It really was spooky.
So I can kinda believe that there would be very few cars, but not zero. I still had to time the photo so there weren’t any cars on that ~2-mile stretch, but it didn’t take long to wait for it.
It’s not deleted the construction vehicles from the M4 roadworks, which implies they did their magic sometime in Lockdown 1 when construction projects also stopped.
Also look like they’ve made it a 3D model rather than a flat image? e.g. this image of the M4 over the Thames at Windsor, you can see the new gantry signs in 3D, but the Balfour Beaty minibus is parked there. https://www.google.com/maps/@51.5101205,-0.6714731,184a,35y,270h,39.51t/data=!3m1!1e3