The Manual of Environmental Appraisal in Practice aims to help assess the environmental impact of new road proposals. It uses a framework approach to compare different options for trunk road schemes. The goal is to consider all effects on people and the environment, make decisions based on full knowledge of consequences, and involve the public in the decision-making process. The framework outlined in the manual helps in route planning and decision-making, as well as informing the public about the implications of road projects.