Cycling in the time of Corona

I doubt very much that wildwest was asking about the M4. :)

It's this sort of sign that you want for A-roads with cycling bans:

https://www.google.co.uk/maps/@51.5153108,-0.2262761,3a,15y,61.3h,88.57t/data=!3m6!1e1!3m4!1sy4t0C1DMQU_rb8N0VTI2NQ!2e0!7i13312!8i6656

These are old; I'm pretty sure they were there 25 years ago when I briefly worked next door.

In more recent years, the list of excluded forms of travel has expanded a bit, e.g. here at the M11 Link Road (euphemistically now called the A12) in East London:

https://www.google.co.uk/maps/@51.5510782,-0.0209562,3a,38y,289.31h,97.3t/data=!3m7!1e1!3m5!1sDsXeWrEI_sH1gJa_MAcagw!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3DDsXeWrEI_sH1gJa_MAcagw%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D209.21313%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192