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Welcome back on World News. Erwiana Sulistyaningsi, an Indonesian maid in Hong Kong, won a civil case this week against her former employer for shocking physical abuse.

Although she is happy with the result, she said authorities aren't doing enough to protect foreign domestic workers, most of whom are women from Indonesia. A Hong Kong court ordered Solis Tia Ning-si's former employer to pay her over US$100,000 in damages for the abuse, which occurred over eight months starting in 2013. The employer, mother to Law Wan Tung, was earlier convicted on assault and other charges, fined and given a six-year prison term.

So, the standing C urged Hong Kong authorities to review current policies and practices, saying not enough is being done to protect workers.

If you're a driver, you know how frustrating it feels when traffic lights seem to make traffic even worse. According to a recent study done at Texas A&M University, each year average Americans spend 38 hours sitting in traffic jams. But scientists who study traffic patterns say the situation can be improved with smart stoplights. V.A.'s George Putich has more.

During the evening rush hour, traffic at this busy intersection in downtown Pittsburgh runs smoothly, with both drivers and pedestrians waiting not more than a minute or two. Instead of timing the lights on the basis of usual traffic patterns, video cameras and radars at each intersection monitor the traffic in real time. From that information that we take in, the system builds a prediction of when

every vehicle it sees through its detection is actually going to arrive at the intersection. And then based on that prediction, we build what's called a timing plan, a plan for how the green is going to get distributed to each approach.

in real time and begin executing that plan. The system was created by a company called SIRTRAC, stemming from a project started at Carnegie Mellon University's Robotic Institute.

From an original nine smart street lights installed in 2013, this area of East Pittsburgh now has 50 interconnected intersections with another 150 planned during the next three years. Calculations show the travel time through the corridor improved by more than 25%. Scientists say there is a lot of room for improvement.

City buses, private cars, even cell phones may in the future be equipped with dedicated short-range communication, or DSRC devices, that will communicate with smart streetlights. They are already experimenting with something that may help handicapped pedestrians safely cross the streets. Smart streetlights have also been installed in Atlanta, and other U.S. cities are on track to upgrade their streetlights.

With self-driving cars already carrying customers throughout Pittsburgh, the city is rapidly becoming a hotbed of advanced traffic technology. Finns take their sauna seriously. The Nordic country of almost 6 million people boasts an estimated 2 million saunas. Now, a northerly Lapland resort is going one step further, offering a movable sauna on skis.

The newly opened Apuka Resort in Rovaniemi recently began offering the sauna on skis, a movable hotbox that takes ice and snow in its stride with the help of a snowmobile. Guests can order the movable sauna delivered to a frozen lake in the middle of the wilderness or perhaps next to their glass roof aurora cabins during an evening of northern light spotting. The sauna on skis is typically offered for two people.

But it is not cheap. A 45-minute session is priced at approximately US$152. The resort boasts a total of 77 beds, from glass-roofed Aurora cabins to apartments and holiday homes. Don't go anywhere and stay with us on World News, because after the break, we'll be taking you to Brazil, where Santa Claus shed his suit and grabbed his surfboard to celebrate the first day of summer at the country's famous Copacabana Beach.

and Katy Perry's Christmas gift to her fans, a new single called Hey Hey Hey.