The sign "Assign demand diversion to the left" indicates that road users must divert their path to the left due to construction, an obstruction, or other specific conditions. This sign usually appears when there's a need to redirect traffic to ensure safety and smooth flow on the road. Drivers should follow the sign's directive to avoid any potential hazards and to comply with local traffic regulations. Always observe any additional instructions or signs in the area as they may provide further guidance on navigating the diversion effectively.