The steep financial cost of the 2028 Olympic Games is starting to come into closer focus in the run-up to the Paris Games, as Los Angeles planners are tabulating the billions of dollars that will be needed to prevent traffic jams and long waits for commuters. Grand plans to build rail lines crisscrossing the region by the time the Games start have been dashed, and officials are trying to figure out how to pay more than $1 billion to run buses that will probably disappear after the Games. After visiting Paris last month, Los Angeles Mayor Karen Bass said the magnitude of the task weighs on her …