If you're a parent with a young child, you'll understand the frustration.
Being forced to park miles away from the supermarket and lug a heavy pram and shopping bags back to the car because there are no free parent and child bays - only to see a childless motorist reverse out of one of the spaces.
Despite the fact that the desired spaces right outside the supermarket entrance are supposed to be reserved for those who need them most, one in 10 motorists admit they're happy to park in spaces clearly designated for disabled shoppers with blue badges or families with children in tow - all for the sake of saving a few seconds.
According to our sister paper Wales Online , the main reason given for breaking the rules is that they have no fear of being fined, but that could all be about to change - at Tesco, at least.
Is it against the law to park in these bays?
No, it isn't illegal, but you could end up with a fine.
Traffic wardens can only penalise motorists parked in a council-owned car park or on the street, so it's up to the supermarkets to patrol their own car parks.
Also, for family parking spaces, the age limit on children can change from store to store, but for most supermarkets it's 12 years or under.
How will Tesco enforce it?
The supermarket chain launched a trial scheme at 81 of its stores in 2016.
It proved to be a success, and the Birmingham Mail are now reporting that it will be rolled out to 200 of its stores nationwide.
It will be enforced by supplying members of staff with an app which allows them to photograph vehicles parked in disabled bays but without a blue badge, or taking up family spaces without any children under 12.
The evidence is then sent to Horizon Parking.
No fixed price has been confirmed by Tesco, but a fee of £25 has been suggested .
Tesco say that it is not a money-making scheme as the fines will only cover the costs plus fees.
Speaking at the time of the initial trial, a spokesman said: "Many disabled customers rely on our disabled parking bays, so we've introduced our self-monitoring initiative to highlight the importance of using the bays properly, making it fairer and easier for everyone to find a space."
How do the other supermarkets deal with problem parking?
Not all supermarkets have the same policies on parking:
Attendants regularly patrol the parking bays at Sainsbury's, and breaking the rules could cost you £60.
A spokesman for the retailer said: "Our parking attendants patrol the disabled and parent/child spaces. Most of our customers use them as intended but if they don't, they will in the first instance be asked to move and if they refuse, they'll be issued with a £60 parking charge notice (fine)."
On the other hand, budget retailer Aldi say that they do not have strict regulations.
A spokesman for the German discounter said: "We offer parent and child, and disabled car parking spaces at all of our standard stores across the UK. These spaces are positioned in a convenient location to allow easy access to the store.
"Although we don't enforce strict regulations, these dedicated parking spaces are honoured and appreciated by the large majority of our customers."
Asda said that they patrol their car parks 24 hours a day to deter irresponsible parkers.
A spokesman for Asda said: "We monitor our car parks 24 hours a day and do as much as we can to prevent the misuse of disabled parking and parent and child bays.
"Any customer found to be parking in a disabled bay who doesn't have a valid blue badge or is misusing parent and child bays will receive a parking charge notice.
"This is to ensure these spaces are kept available for the customers who need them the most. If customers have any questions regarding this, our colleagues in store will be more than happy to help."