Chip or crack: what decides whether the glass stays
A windshield is two layers of glass with a plastic sheet bonded between them, and that sheet is why a small chip can often be saved. If the impact has not gone all the way through, a chip can be filled and the glass kept, which is the reason windshield chip repair is worth a phone call before the chip has time to spread.
Dirt, water and temperature swings all work against a chip. One cold night or one hot afternoon on the highway can turn it into a crack that runs across your line of sight. Once that happens, filling it no longer helps and the glass has to come out. Ron Kirk's Body Shop does both jobs, repair and replacement, on all makes and models.
Their own line says it best: "Cracked or Broken Windshield? Bring It on Down!" Drive it to 501 Vermont Ave in Holton or call (785) 364-2931, and describe what you are looking at. A chip you caught early is a very different job from a windshield that has already split.