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When to Use a Dolly Mounted Sign

February 13, 2020

You’ve probably seen a dolly mounted sign on city streets or highways, even if you don’t realize it. The signs are becoming more common every year, thanks to innovations by traffic control device manufacturers such as TraffiCalm. These electronic displays are handy because they are built on wheels, making them easy to move around from site to site. Here are scenarios that call for these highly efficient mobile signs.

Speed Limit Monitoring

In the category of driver feedback signs, a dolly mounted sign is typically used for letting drivers know their current speeds in relation to the speed limit. Usually this electronic radar device is placed above a traditional speed limit sign. The sign has value to both authorities and drivers, as its intent is to calm traffic and get drivers to slow down under the speed limit. Once drivers realize they are actually being monitored by radar, they tend to slow down to avoid an expensive speeding ticket.

These portable electronic displays can be used for multiple reasons beyond reminding drivers to slow down. They are often used to reduce traffic tickets, but they can also be used to crack down on fast drivers who violate the law. They can further be used to run tests to see how well they work as traffic calming devices for a specific area. Additionally, they can be used to collect data for analyzing traffic speeds.

Protecting Schools and Neighborhoods

One of the most common places to install a portable dolly mounted sign is near a school or residential area. These machines remind community residents that their local leaders are watching out for their safety, particularly for school children who use crosswalks. They also help guide visitors to safer driving conditions in unfamiliar territory.

The LEDs on these machines are bright displays of 12 inch tall characters, making them easy to read from 600 feet away. For drivers with excellent vision, it can be viewed from as far away as 1,000 feet. It doesn’t hurt to remind drivers when they are entering a school zone or a neighborhood that facilitates foot traffic.

Mobile Advantages

These portable devices made by radar-based traffic feedback pioneers, TraffiCalm, have programmable capabilities, making them useful and flexible for sending several different types of highly visible messages to drivers. These innovative MUTCD compliant signs are designed to be durable, accurate, affordable and easy to use. The mount is both detachable and lockable, as it can easily be bolted or banded to a pole or flat surface.

Since a modern dolly mounted sign runs on a battery, it doesn’t need to connect with cables or cords for power supply. It is truly a mobile unit and can be moved quickly for best possible placement. The sign doesn’t take up much space, nor does it cost much to operate. The battery stores enough energy so that it can be used for several days without recharging. It can be quickly moved in and out of accident scenes without interfering with traffic.


A dolly mounted sign helps reduce accidents and keeps drivers focused on their safety responsibilities. Contact Zumar at our Arizona, California or Washington location to learn more about how to use a dolly mounted sign. We can also answer any of your questions about a wide range of other signs for streets and organizations.

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