My Mum 74 with moderate AD has no traffic sense either.
Mum & Dad live in their own house behind ours and I have almost run her over reversing/driving out our garage as she just appears out of nowhere, and gets as close as she can get to our garage rather than wait on her doorstep where i could see her.
She knows for now we don't like her walking up to our main shopping centre which is only a 15mn walk but 2 very busy roads to cross. We tell her its because of the troublemakers hanging about by the bus station.
She asks dad to go with her.
We don't mind her walking down to or local dairy which is 5mns, the shopkeepers know her and have my phn no.
Occasionally though when I am at work, Mum will get it into her head she wants to go to the bakery, a 10mn walk with one busy intersection patrolled by traffic lights.
Dad doesn't think to go with her, and one day I fear she will forget to press the buzzer to cross, or will think its gone off when it hasn't and will step out in front of a car.
One time when talking about it, she said we can't keep her a prisoner in her home.