You're confusing three things here. Yes, sunglasses are necessary because the white cement is blinding. That situation is literally what sunglasses are for. B

You're confusing three things here. Yes, sunglasses are necessary because the white cement is blinding. That situation is literally what sunglasses are for. But polarized sunglasses are no better than regular sunglasses in this regard. Polarization does nothing extra for rough surfaces like cement. And you're talking entirely about reflected sunlight, which is what sunglasses are designed for. But the topic was direct sunlight straight into your eyeball while driving, and sunglasses provide no help or safety here. Polarized or not.