Key factors to consider when deciding to repair or replace a windshield:

• Size of damage:
  Cracks longer than a dollar bill or chips larger than a quarter typically require replacement. 

• Location of damage:
  Any crack or chip directly in the driver's line of vision needs to be replaced. 

• Depth of damage:
  If the crack penetrates more than halfway through the windshield thickness, a replacement is necessary. 

• Edge involvement:
  Cracks extending from the edge of the windshield usually need replacement due to the risk of spreading. 

• Multiple cracks:
  If there are several cracks close together, the windshield may be compromised and need replacement.