you are right, hence the points where the service roads hit the highway need some preparations to be done so traffick can not cross there, so they just can enter the highway but not cross. as you said, the average driver does not have the mind/traffick experience/traffick education to forsee the dangers of such situations, hence the Highway's mid section has to be prepared to force the Campesinos from the sideroads and service roads to do the right thing. it is not just the trucks from Central La Romana, it is also the many chicharras/ lil trucks from people living there in the areas off the highway, who cross at all points when entering/leaving their area, and as we all know do many of those campesino fruit trucks not even have the proper lights or any lights so the ongoing traffick on the highway could even see them in the dark.
not so many years back the vast mayority of vehicles on PC roads had inapropriate to non existing lights working on their vehicles, much less lighjts on the campesino vehicles. there are traffick educational and highway correctional actions needed during the times of change on the formerly used to traffick behaviors.
hopefully all the victims now at the hospitals will receive proper care and will survive.
Mike