What to do about constant broken car window because of rocks?

Broken and chipped front windows are very common here in Alaska due to extreme temperatures and the fact that we use small rocks to provide traction in winter. Salt doesn't work when it's below zero. All of my cars have had broken windshields. Unless the cracks or chips are interfering with the driver's vision, many people just ignore it until they grow big then replace the window. Also, keeping a larger distance from the car in front, and slowing down in winter helps somewhat.

Below is a coating product advertised to provide protection. Effectiveness is a question mark. The main rule is never follow a dump truck or a truck loaded with construction equipment. They tend to shed rocks that will bounce up and hit your windshield. Stay as far away as possible. This will keep most vehicles safe in most areas (normal paved roads with moderate weather). My wife and I drive the same amount on the same roads and she gets chips regularly while I virtually never get them. The difference is driving habits. She s a tailgater and has no fear of dump trucks. Alaska may be a totally different story. Not sure if anything will help there, but it seems that following distance would be a major factor anywhere.

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