What should be considered when determining if a roadside device is fixed or portable?

When determining whether a roadside device is fixed or portable, the expected duration of installation is the primary consideration. Fixed devices are usually intended for long-term use, such as those that require permanent installation, while portable devices are designed for temporary use and can be moved or relocated easily as needed. This consideration impacts how the device is set up, maintained, and monitored throughout its intended use.

For instance, if a device needs to remain in place for the duration of a construction project or traffic control setup, categorizing it as fixed makes sense. Conversely, if the device will only be used for a short period, like during a special event or a temporary traffic pattern change, it will typically be classified as portable.

Other factors may influence the decision, but they do not directly relate to the classification of the device. The size of the signage, cost of materials, and even the color of the signs can play roles in the overall planning and design of traffic control systems, but they do not define whether a device is fixed or portable. Therefore, focusing on the expected duration of installation is essential for accurate classification.