Advice NOT from your local Police.

Running and screaming from an attacker I would do if I thought it was the best thing to do.  I don't.
In an attack you may find that running is not an option due to health problems, a previous injury or the attackers being everywhere you want to run and younger and fitter than you.  Don't rely on the chance you can run faster or for longer than your attackers or their accomplices with a convenient vehicle.  The attacker's plan might be to get you to run in a direction they have already selected for you.
Carry something to even the odds in your favor.  I think you know what I mean.  You can work out the rest for yourselves.  Why not? Police did.