Schedule 1, Paragraph 27: Part 3: Nationally Significant Infrastructure Projects Section 22: Highways
89.This section sets out the circumstances in which highway-related development is a nationally significant infrastructure project. The following are relevant highway-related development-:
	construction of a highway which is to form part of the Strategic Road Network (that is, a highway in England for which the Secretary of State will be the highway authority)
	improvement of a highway which forms part of the Strategic Road Network (but only where the improvement is likely to have a significant impact on the environment)
	construction or alteration by the Secretary of State of a highway in England for a purpose connected with the Strategic Road Network