Convex Mirror
Enhancing Safety at Four-Way Intersections with Mirrors
See how full dome mirrors help at warehouse four-way intersections, what mounting height matters, and how to think about dome sizing before you order.

Why this article matters
A focused guide to improving sight lines at warehouse-style four-way intersections where forklifts, carts, and pedestrians share the same crossing.
- Key point: A full dome is often the cleanest way to cover a four-way crossing from one central point.
- Key point: Mount the mirror low enough to be useful, but high enough to clear masts, pallets, and loads.
- Key point: Sizing should follow sight distance and aisle width, not just ceiling height.
On This Page
- The Importance of Mirrors in Four-Way Intersections
- Full Mirrored Domes: A Comprehensive Solution
- Choosing the Right Size Mirrored Dome
- Available Dome Sizes
- Alternative Solutions for Restricted Spaces
- Convex Mirrors
- Available Convex Mirror Sizes
- DomeVex Wide View Convex Mirrors: A Versatile Option
- Available DomeVex Sizes
- Implementing Mirror Solutions in Your Facility
- Conclusion
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The Importance of Mirrors in Four-Way Intersections
Four-way aisle crossings are one of the easiest places for visibility problems to turn into equipment damage or near misses. A properly placed dome mirror does not replace good traffic rules, but it gives drivers and pedestrians earlier visual confirmation before they enter the intersection.
Full Mirrored Domes: A Comprehensive Solution
A full mirrored dome suspended over the center of the intersection provides a viewing distance to the right and left from each angle. These domes should be mounted as low as practical, accounting for the height of forklift masts and product loads moving within the building.
Choosing the Right Size Mirrored Dome
When selecting a mirrored dome, size matters. A useful rule of thumb is that 1 inch of mirror diameter equals about 1 foot of viewing distance. Consider your facility's specific needs and travel speeds when determining the size of the dome. Where there is doubt, a larger size gives employees more margin for a safe working environment.
Available Dome Sizes
Mirrored domes are available in various sizes to suit different facility requirements:
- 18 inches
- 26 inches
- 32 inches
- 36 inches
- 48 inches
- 60 inches
Alternative Solutions for Restricted Spaces
Sometimes the application does not allow a hanging dome mirror within the intersection. In those cases, alternative solutions can still improve safety.
Convex Mirrors
Placing a few convex mirrors beyond the intersection and aiming them at the desired viewing angles can provide a specific view of the area. The placement should offer the best angle to alert people approaching from all directions.
Available Convex Mirror Sizes
Convex mirrors come in a range of sizes to suit different needs:
- 12 inches
- 18 inches
- 26 inches
- 30 inches
- 36 inches
- 48 inches
DomeVex Wide View Convex Mirrors: A Versatile Option
DomeVex Wide View Convex Mirrors offer a broader view of blind spot areas when mounted beyond the intersection and aimed at the desired viewing angles. Their curvature provides a wider angle view as a forklift operator moves.
Available DomeVex Sizes
DomeVex mirrors are available in the following sizes:
- 16 inches
- 24 inches
- 32 inches
- 42 inches
Implementing Mirror Solutions in Your Facility
When implementing mirror solutions in your facility, assess your specific needs and layout. Consider factors such as the size of the intersection, the height of forklift masts, and the speed of traffic flow. Work with an experienced safety equipment supplier to determine the best mirror type, size, and placement for your facility.
Conclusion
Safety mirrors are a simple and effective way to improve safety at four-way intersections. By providing clear visibility and early warning of approaching traffic, mirrors can reduce the risk of accidents involving pedestrians and forklifts. Choosing the appropriate mirror solutions for your facility helps create a safer working environment for your employees.
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