The premium for Part B coverage is determined by Medicare. The monthly premium amount is available in the Medicare & You handbook produced by the U.S. Centers for Medicare and Medicaid (CMS) and is also available on the Medicare website at www.medicare.gov.
The fact is, there is a precise width of lane that must exist for cyclists to operate their vehicles safely, and it's not the 4ft standard width bike lane, nor is it the 6ft standard width bike path, nor is it the 14ft wide outside lane.
Traditional lap pools are about 10 feet wide, though widths between 8 and 10 feet are common. (In competition pools, swim lanes are 2.5 meters wide, or about 8.2 feet.) You don't want to go too narrow with a lap pool. When people swim, their bodies generate wave action, and those waves reflect off the sides of the pool.