The simple answer is yes and I have in the past on sev occasions tho as Teresa says each scenario is different and you don't know until you're faced with it. I have to say tho it only takes one armed dangerous person to kill you and I have faced people with guns at work - which is a bit different - there is a shred of authority there - I don't know that I would do it again now that I am older and not in a working position.
I regularly move things out of the road but the nearest I've got on a motorway was following a horse box that lost control, jack-knifed with the box getting seperated from the car and came to a spinning halt in the fast lane with two horses in it
I ran back up the hard should waving my arms and trying to get folks to slow down! No-one plunged into the box and the horses were rescued. I did inform the police tho and the person towing the box was stopped further up the motorway but I don't know what the result of that was.
We often move toads and caterpillers - it can be tedious sometimes keep getting out of the car but I've always done it and my concience wouldn't let me drive on .........
I'm very aware when travelling esp at dawn and dusk and I go much slower at night always expecting something to run out ......... to date I know I;ve killed a toad, a rabbit, a blackbird and a whitethroat freshly arrived from Africa in spring which upset me very much - it flew over a hedge in Anglesey and smack into my windscreen - not a thing I could do about it - same with the blackbird on the M6.
Pauline