I've been bitten by that multiple times, and had to learn to check a few turns ahead to make sure I'm not about to be asked to make an unprotected left turn acr

I've been bitten by that multiple times, and had to learn to check a few turns ahead to make sure I'm not about to be asked to make an unprotected left turn across rush-hour traffic in an attempt to save 2 minutes at a light. I would be interested in trying out a "no left turns" (or at least no unprotected left turns) route preference.