There used to be a Jolly Trolley which had an old fashioned appeal in Long Beach Island New Jersey, which has a very similar layout to 30A in many respects. It's 19 miles long and has named beach communities up and down the stretch. The main road running North and South along the Blvd. separates the bay from the ocean side and is 2 lanes on each side. I haven't seen the Trolley in years and I am not sure if it is still running. If not, it probably wasn't successful. It was run by The Alliance for a Living Ocean. There is a successful one in Rehobeth DE which based on their web site runs 8am -2 am during summer season. I have never seen it personally since I've never been there so I can not comment on the density and the stops it makes. But it is dowdy looking to say the least from their web site, unlike the LBI one which had a nostalgic appeal. In my opinion, the only use for a trolley would be for day trippers to Seaside/WaterColor/ Rosemary/Grayton/ Alys where parking is limited with it running and picking up people from Sandestin and Miramar where there is a higher density. I think it would raise revenues for 30A communities.
I like SJ's idea of a light engine train running from Nowal to Sowal down to close to the end of 395 and 30A intersection for commuters. A lower carbon footprint, less accidents, and more economical especially with gas prices. Then from there possibly shuttle transfers to various communities. But the idea of one on 30A seems Disneylandish in my opinion. I also don't think one running West to East on 98 would benefit a majority. Most of the vehicles I see on 98 are contractors with pick ups.