the Anadyr Highway is expected to be completed connecting Ola and Anadyr, which is only about from the strait. U.S. side On the U.S. side, an estimated of highways or railroads would have to be built around Norton Sound, through a pass along the Unalakleet River, and along the Yukon River to connect to Manley Hot Springs Road – in other words, a route similar to that of the Iditarod Trail Race. A project to connect Nome, from the strait, to the rest of Alaska by a paved highway (part of Alaska Route 2) has been proposed by the Alaskan state government, although the very high cost ($2.3 to $2.7 billion, about $5 million per mile, or $3 million per kilometer) has so far prevented construction. In 2016, the Alaskan road network was extended westwards by to Tanana, from the strait, by building a fairly simple road. The Alaska Department of Transportation & Public Facilities project was supported by local indigenous groups such as the Tanana Tribal Council. Track gauge Another complicating factor is the different track gauges in use. Mainline rail in the US, Canada, China, and the Koreas uses standard gauge of 1435 millimeters. Russia uses the slightly broader Russian gauge of 1520 mm. Solutions to this break of gauge include: To have all cargo in containers, which are fairly easily reloaded from one train to another. This is used on the increasingly popular China–Europe rail freight route, which has two breaks of gauge. It is possible to transfer a 60 container train in one hour. Another solution is variable gauge axles for locomotives and rolling stock, such as those made by Talgo. A gauge changer modifies the gauge of the wheels while the train traverses the GC equipment at a speed of , which is about 4 seconds per railcar. This is faster than is possible with the transfer of ISO containers. The TKMWorld Link The TKMWorld Link (Russian: ТрансКонтинентальная магистраль, English: Transcontinental Railway), also called ICL-World Link (Intercontinental link), was a planned 6,000-kilometer link between Siberia and Alaska to deliver oil, natural gas, electricity, and rail passengers to the United States from Russia. Proposed in 2007, the plan included provisions to build a tunnel under the Bering Strait, which, if built, would become the longest tunnel in the world, surpassing the Line 3 (Guangzhou Metro) tunnel. The tunnel would be part of a railway joining Yakutsk,