The sign "Restricted prohibition of stopping in the middle - Installation on the left" indicates that stopping your vehicle is prohibited in the designated area, specifically in a lane located to the left. This sign is typically placed where it is important for traffic flow and safety to prevent vehicles from stopping, such as near intersections, pedestrian crossings, or construction sites.

Drivers are required to continue driving without stopping in these areas to ensure that traffic remains smooth and to avoid any potential hazards. Ignoring this sign can lead to fines or other penalties, as well as create dangerous situations for other road users. It's important to always pay attention to such signs and comply with their directives for safe driving.

If you have any more questions about traffic rules or need further clarification, feel free to ask!