Long Duration Work : Programmed construction, maintenance and utility activities which require a separate work area for more than one daytime shift. Thus most work at night should, therefore, be considered long duration
British Columbia Ministry of Transportation, Traffic Management Guidelines for Work on Roadways, Glossary & Abbreviations, British Columbia, Canada 2001. https://www.th.gov.bc.ca/publications/eng_publicat ions/geomet/traffic_mgmt_guidelines.pdf, (Road Trfc and Transp Sfty - Canad) {989}