Truck drivers operate very heavy vehicles requiring an increase in the required stopping time. Truckers may negligently run red lights due to a combination of factors including fatigue, driving in unfamiliar areas, poor vision conditions (e.g., at night or during inclement weather), and pressure from employers or other drivers to speed up delivery times. These conditions can lead to truckers not being able to react quickly enough when approaching intersections and running through red lights. In addition, some truckers may be under the influence of drugs or alcohol which increases their chances of running through traffic signals.