Q: On recent trips to Las Vegas traveling on Interstate 15, Riverside resident Janet Field said she noticed that the rest stops along the interstate were closed in both directions. She wondered why the rest stops are not being used, and said they appear to be in good condition. A: Water and electrical problems are to blame for the closures of rest stops on 1-15 between Riverside and Las Vegas, said Caltrans spokeswoman Terri Kasinga. The rest stops outside of Barstow and Baker are just old and need major repairs or rehabilitation work, which is why they are closed. Kasinga...