A New Traffic Light Feature?

Interesting new road safety feature at the crossing near Holborn station:

It counts down the number fo seconds until the traffic starts flowing again.

I must admit, my first reaction to these, as I headed in search of a sandwich, was disbelief – do we actually need these countdowns? And then, I remembered the number of rather horrible accidents I've seen from the EG office, including watching the police setting up a tent over, presumably, a mangled body, while I was in a meeting in the publisher's office.

Maybe we *do *need them.