What additional inspection may drivers be subjected to due to environmental regulations?

The additional inspection that drivers may be subjected to due to environmental regulations is a roadside pollution test. This type of inspection is specifically designed to assess the emissions of vehicles and ensure that they comply with environmental standards. It focuses on measuring the pollutants released by a vehicle while it is in operation, helping to monitor and control air quality in urban and industrial areas.

Roadside pollution tests are critical because they can help identify vehicles that emit excessive pollutants, contributing to environmental degradation and public health concerns. These tests can often be performed quickly at strategic checkpoints, allowing authorities to maintain oversight of the fleet on the roads and ensure compliance with regulations designed to protect the environment.

While emission checks are a relevant concept tied to pollution control, the broader term of roadside pollution test encompasses a wider scope of assessments that may include checking for various pollutants. The other choices, such as roadside trailer inspection and environmental impact assessment, do not specifically pertain to the immediate measurements of emissions performed on a vehicle at roadside inspections. Therefore, the roadside pollution test is the most relevant answer in the context of additional inspections related to environmental regulations.