You should leave at least a two-second gap between your vehicle and the vehicle in front to ensure you have enough time and space to react and brake safely if the vehicle ahead suddenly stops or takes emergency action. This gap is a minimum safety buffer to reduce the risk of collision under ideal driving conditions by allowing for reaction time. Increasing the gap in poor weather or hazardous conditions further improves safety by compensating for longer stopping distances and reduced visibility. The two-second rule helps prevent rear-end collisions and makes driving safer for all road users by avoiding tailgating and allowing adequate reaction time to unforeseen events.