A trigger happy speed camera in Hanworth has been causing sleepless nights for more than a year, according to one woman.
A spokesman for TfL said it had addressed the issue as soon as it was alerted to it, and staff were now investigating what had caused the problem.
But Julie Young, who lives beside the road, near Hampton Farm Industrial Estate, said she had been complaining about the faulty camera for more than a year.
The 45-year-old carer told getwestlondon it often flashed repeatedly for no reason, and said the effect at night was akin to a non-stop electrical storm.
"It's like having lightning going off outside your window, and it's been a problem on and off for about 18 months," said the mother-of-two.
"Combined with the noise roadworks along this stretch, which are always taking place at night, it's like a thunderstorm, which makes it impossible to get any sleep.
"We get that it's a dual carriageway but they (TfL) constantly ignore the fact it's also a residential road."
Ms Young said it was not the first fiasco with the pair of cameras at the site, which she claimed were originally installed facing the wrong way and had remained like that for more than a year.
"For a whole year, neither camera went off once and I can't believe it took them so long to notice the drop in revenue," she said.
"Since they were turned round one of there's been a problem with one of them flashing constantly every few weeks. You often hear drivers breaking suddenly and then see the puzzled look on their faces because they weren't going that fast."