Long time fan of Disneyland. For years my career has been in the facilites operations field and Disneyland has always been an inspiration to me. If I am not working or at Disney you will either find me riding my bike or out for a run.
So remember this ride. I have a picture of me on this ride with my dad as a little kid. Thanks for posting and bringing back more happy Disney memories for me. So excited to be there in less than a month.
My guess and only a guess would be the door coaster or possibly a Planes related ride. From the drawing looks to be a ride designed to save space. Doesn't look to have a large footprint that would need much land.
I personally like just sitting up front with the driver on the monorail and enjoying the view and different perspectives of disneyland. Also a fun place to sit while crossing the Hyperion bridge and the tunnel through the grand.