1 . Each week, the BBC Autos editors select their favourite transport-related news stories, features and videos from around the web. This week, we noticed a trend toward offering creative solutions to global transportation problems.     1    .

Carry on without your carry-on

In an effort to save money and increase customer spending, United Airlines will restrict some passengers’ access to overhead compartments. The Huffington Post reports that United will be the first US airline to limit “basic economy” flyers to a single free carry-on bag that can fit under a seat.     2    . In addition, customers buying these low-fare tickets will be unable to accrue airline miles and will be randomly assigned seating the day of the flight.

    3    .   As BBC Autos reported back in October, airlines are struggling with reducing cargo weight. Because heavier bags — and heavier passengers — result in significantly higher fuel bills, airlines such as Samoa Air have implemented a “fat tax” that means overweight passengers have to pay more for a ticket.

Grandad’s Coke pool rust-removal stunt goes wrong

Not only are fizzy drinks(起泡饮料) capable of rotting teeth, they can also remove rust(锈). One Latvian grandfather decided to put cola to the ultimate rust-removal test by submerging his car in a pool of Coca-Cola. In a video posted online, the unnamed daredevil grandad fills a lined pit with 6,000 two-litre bottles of Coke. He then settles into the driver’s seat and speeds into the hole, smashing the front of his red Audi. Whether or not the rust was removed is unknown, but the Daily Mail contends that “    4    ”.