Choosing the Right Radar Speed Sign

1.  Displays with built-in data collection features can be valuable, saving staff time in conducting future studies or proving effectiveness.

2.  Choose sign features based upon need. In some cases, simple signs may be best. Additional features such as data collection may increase technical issues that require management. Also, additional features typically come with additional costs.

3.  Choose a sign that provides a settable speed threshold limit. This prevents drivers from testing to see how high they can get the display to register.

I would like to add a few to this list.

1. Choose signs that look official. There are lots of models out on the market today. Some simply look wrong.  MUTCD provides design guidelines that govern everything from the color and shape of the sign to the size and style of lettering. Even if your application does not require MUTCD compliance, the effectiveness of the display is contingent upon driver perceptions of its legitimacy.
2. Vandal resistance. Displays will get abused. Choose a radar speed sign that is resistant to being hit, slammed and shot at. Solid-state designs are best. Shields protecting the display are important.
3. Easy to repair. If a display is damaged, it’s important that a non expert can easily fix it - in the field. Some radar speed signs require that the display be taken down and sent back to the factory. Others can be easily repaired right from where they are mounted.
4. Clear, visible and focused. Today’s top rated display signs offer designs that make them clearly visible only to THOSE DRIVERS BEING TARGETED. Poorly designed signs can easily distract unintended drivers.

The Bellevue study has several tips for radar speed sign placement. These include:

1. 

   Mounting considerations - radar speed signs

   Set up the radar speed sign at a location that has a minimum distance of 300 feet of clear sight between the display and the drivers.

2. Choose a spot with a convenient power source nearby. If this is not possible, consider solar powered displays.
3. Solar powered signs work best where light levels are adequate for the sign application.
4. Chose a spot where the light from the display will not disrupt homeowners.
5. Avoid obstructions. Try to avoid locations where parked cars and other objects may obstruct the view of oncoming motorists.

Once the location for the radar speed sign is chosen. The Bellevue report provides the following tips on installation:

1. Install the sign at an appropriate angle so that the radar can pick up passing motorists (specified by the manufacturer).
2. Mount with concrete footing.
3. Install at a minimum height of seven feet from the bottom edge of the sign to the ground.
4. Include a posted speed limit sign above the radar speed sign.

We really owe the city of Bellevue our gratitude for sharing this information and personal experience with the rest of us concerned with traffic safety. Their report shares important data that serves as an excellent guide for others looking to slow traffic and increase pedestrian safety.