Thats a Thevetia. I often see them around LA, especially on freeways, but not as much as oleanders. There is some along the 405 around LAX too. Probably toxic, so careful about touching them. They are mostly shrubs, but some are tree forms. Not sure if they are different species or not, or if the tree forms are grafted.
Notice the flowers have the pinwheel shape like a plumeria or an oleander?
I picked one of the fruits from a parking lot once and put it my pocket in hopes of growing it from seed. Then later in the day I notice this greenish brown gunk like boogers coming out of my pants and it was the pulp of the fruit (I guess it turned brown from oxidization).
