… Dear Gabby, How Do You Plan Detours? … Dear Gabby, How Do You Plan Detours? Gabby is here to share and answer the hundreds of questions you send to her every day. She's your source for the inside scoop on everything you ever needed to know about mastering the art of public transit. Email her at … it’s rerouting, and suddenly you’ve got a whole new set of directions to get you to your destination. Rerouting a bus line is not nearly as quick or as easy, but we have just as many road obstacles as cars do. So what does it take to plan a detour …