The only women street walking are junkies, the are desperate, sad, look a state and you would need to be desperate.
The cops still patrolling the areas where the few that are left are and will stop, charge you, take you to court and you can lose your car.
Is the risk worth it, getting a crap blow job in your car from a junky?
You could go back to her palace or invite her into your house, if your are really desperate.
Best advice stick to the internet.