No one likes to see weeds growing where they do not belong, especially when they are in your driveway. Whether they are growing in the cracks of your driveway or coming up in patches along your gravel driveway, you'll want to make sure to kill these weeds and prevent them from growing back. In order to do so, you can use common items that you should be able to find around the house.
Pour boiling water on top of the weeds or into the cracks where the weeds are growing in your driveway. The hot water will kill the weeds by cooking the roots. Repeat on a daily basis until the weeds in your driveway die.
Spray vinegar onto the weeds in your driveway to kill them. The acetic acid in the vinegar will draw out the water in the weeds and cause them to dry up. Repeat on a daily basis until the weeds die. Although the top portion of the weed may die, this method may not always kill the root of the weed.
Spread some salt over the weeds in your driveway to kill them. The salt will prevent the weeds in your driveway from being able to absorb water and eventually kill them. Use a small amount of salt if you wish to only kill the weeds currently growing. Use a larger amount of salt if you want to prevent weeds from ever growing back in that area of the driveway.