What should a driver do when encountering a traffic light while driving a combination vehicle?

When driving a combination vehicle, it is crucial to approach a traffic light with caution, ensuring an adequate stopping distance. This is particularly important because combination vehicles, which consist of a tractor and one or more trailers, require more time and distance to stop compared to standard vehicles. The added length and weight mean that the driver must account for the vehicle’s braking capabilities when assessing their stopping distance.

Furthermore, by approaching with caution, the driver can better anticipate the actions of other vehicles and pedestrians at the intersection. This vigilance allows the driver to respond appropriately to any changes in traffic conditions, such as vehicles stopping suddenly or pedestrians entering the crosswalk. Critical to this approach is the driver's responsibility to comply with traffic signals and laws, which enhances overall roadway safety for everyone involved.

The other choices do not align with safe driving practices. Speeding up risks accidents and is often illegal, ignoring traffic lights undermines the system of traffic control, and yielding without stopping may not allow for a safe assessment of the situation. Thus, option B reflects the best practice for safely navigating intersections while operating a combination vehicle.