This is the 5274th most frequent Russian word.
ограничена
Limited.
In this sentence, 'ограничен' means 'restricted' or 'curtailed', describing a limitation placed on 'доступ' (access).
Доступ к ресурсу временно ограничен.
Access to the resource is temporarily restricted.
Here, 'ограничена' is used to indicate that someone's role was specifically limited by someone or something—in this case, by 'руководством' (management).
Ее роль в проекте была строго ограничена руководством.
Her role in the project was strictly constrained by the management.
In this usage, the term 'ограничена' signifies a regulation or limitation imposed on 'Ширина прохода' (the width of the passage) by 'строительными нормами' (building codes).