I'm thinking of yelling at my dog to get her to run towards the road.
Why would you yell at your dog so that it runs into the road?
This is why I need to yell at her to get her moving towards the road.
You shouldn't yell at your dog in order to get it to flee into a road. If the road is being used by vehicles your dog could be hit by a car and suffer injuries or even die. If you no longer want your dog to the point you're willing to harm it, give it up for adoption instead.
Why can I not yell at my dog since it is my property?
You're an owner of your dog and she's under your protection. It's wrong to treat your pet badly. As said before if you don't love your dog just give it away.