The M27 motorway is named as the worst motorway due to persistent disruption from roadworks, according to reports. Multiple outlets describe long-running maintenance and upgrade work focused on road surfacing and modifications to junctions along the route. The coverage points to ongoing projects that continue to affect journeys, contributing to the motorway’s poor ranking.

While the reports do not provide extensive detail on the ranking methodology or specific start and completion dates for each phase of work, they agree on the central issue: the M27 has experienced repeated or prolonged construction activity rather than short, completed works. The referenced projects include improvements related to resurfacing and junction changes, which can involve lane restrictions, closures, and temporary traffic arrangements.

Overall, the articles present the M27’s current state as the result of continuing infrastructure work, and they frame the motorway’s designation as reflecting ongoing impact on drivers rather than a one-off incident or localized event.