It's a long-shot, but you could trying contact your government and express your desire for a safe commute. Even better if you can find other cyclists wanting to make that trip, or who you see already doing so. Since there's a dedicated bike path that just ends there, it wouldn't be outrageous to ask for it to be extended/connected. Maybe they'll just paint a sharrow on the stretch, maybe they'll pave the shoulders, maybe they'll flat out tell you to drive, but it wouldn't hurt to ask and find out.