+1 what everyone says. Can you ride with other cyclists? You're more visible as a group. Even in bike-friendly parts of the city I work in I've noticed this happening. Riders are casually agreeing to ride with each others, single file and in a line but more visible this way.

Is there a detour? Think side streets, parallel roads ... let the cars have that narrow road and find a way around it. This will be further to ride but may be safer still.