Dear Gramps: Who do you tell?
There is a high risk fire hazard that by all appearances is being neglected by code enforcement and the presumed property owner Cal Trans. The trees, brush, and weeds along the freeway off ramps on Barton Road are ripe for a hot tail pipe, spark, car accident or spontaneous combustion. Of particular concern is the off ramp by the Animal Hospital. If there were fires along the off ramps they could spread depending on the wind conditions.
Well, a call to Grand Terrace Code Enforcement or CalTrans may be in order. Perhaps the Fire Station knows how to get the problem addressed. The water to the off ramps may have been cut with the expectation that the plants would be removed during construction. Good eye in spotting a hazard. Good luck in getting it mitigated.