Sat hunched over a picnic table next to a pram, her back to traffic, the eerie figure has fast become the stuff of folklore.
So much so, locals have even given her a nickname, as the legend of 'Betty Bypass' spreads.
Baffled drivers are said to look out for her while passing with truckers spotted stopping for a photo on their travels - even council officials with safety concerns have been known to seek her out.
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But Betty never moves for her favourite spot next to Nick's Sandwich Bar food van on the A38 in the West Midlands.
Birmingham Live reports how Betty has gathered quite a following during the 10 years she has been appearing at the roadside.
Food van owner Nick Husband, 58, from Rubery, has grown attached to the strange figure over the years and said: "'Betty Bypass' gets a lot of attention around these parts and is seen in all sorts of places from the road with her pram.
"She's been around for about 10 years and hopefully with me for a long time to come as Betty is like family."
But the beginnings of this eerie tale start with practical joker Nick, who bought 'Betty' the mannequin from the PDSA charity shop in Rubery High Street so he could pose her in different positions with a pram next to the food van.
"I get someone asking me every day about Betty," chuckled Nick. "Some think she's real, many take their photos with her and others worry about her being homeless and want to help her.
"A few years ago, a council officer came down saying it was on the agenda to discuss her at the next meeting as councillors had raised concerns about 'the lady'.
"I said, 'go and take this drink over to her' and he couldn't believe it when he realised she was a mannequin. 'Oh no!' he said 'the report is all done for a council discussion now!'
"I took the pram away for a while and people kept asking me 'Where's the baby gone?', we just told them it's grown up and gone to school."
Nick, who sponsors Cofton Athletic Football Club and donates food to the homeless in Birmingham city centre regularly, also poses 'Betty' up for special occasions, such as with Champagne for the New Year.
"As soon as I saw Betty in the charity shop, I knew I wanted her," added Nick. "She cost me £20 but it's the best £20 I ever spent."
Nick's colleague and best friend Sue O'Leary, 52, who used to run tearoom Polly Put The Kettle On in Rubery, said Betty provides a lot of entertainment for the pair and their regulars, who include staff from across the emergency services.
"Nick is a practical joker and has come up with all sorts of things around Betty," added Sue.
"He's had taxi drivers buying burgers here and told them she's been waiting hours for a cab, just to see what happens when they go over.
"Betty has just become a familiar face to our regulars. We get a lot of police officers, ambulance staff and carers visiting us here as they are on the road all day.
"No celebrities yet although we have had royalty go past when Prince Charles and Camilla were in the area. They didn't stop but I wonder if they spotted Betty too."
A local tree surgeon for the area has also joined in the fun by adding toy monkeys high up in the trees near Betty for visitors to spot too.
