Making a Visible Difference in Roadway Safety


Post-Alert™ - Box of 10

  • $467.00

Available Options

The Post-Alert™ significantly enhances the day and night-time visibility of traffic signs and their posts.

Signs are one of the most important methods of communicating to motorists. But, to be effective, they must be seen. There are millions of signs on our roadways and all play a very important part in this communication. However, there are some that display messages that are more critical than others, and need high emphasis. In addition to these high emphasis signs, there are other times when signs need enhancement due to their placement in relation to the travel-way. These signs may be too close or too far from the travel-way, or have a partially obstructed view.

*Installation hardware sold separately

Post-Alert™ on a crosswalk sign post at dusk
Median-Alert™ shape and design


Effective - Provides visibility and conspicuity for traffic signs and their posts, regardless the time of day or the direction of approach.
Durable – Heavy-duty and innovative design results in years of effective life for most all roadway applications and environmental conditions.
Versatile – Many uses, colors, sizes, marking configurations and mounting. Insuring a more clear, concise message of most any traffic sign. Ease of installation - Can be installed in 5 minutes or less with standard traffic sign tools and hardware. Keeping both the motorist and the installer's safety in mind.


One - Visually enhance high emphasis traffic signs. These are signs in need of special conspicuity. Examples of these are mid-block pedestrian or school crossings, highway entrance and exit ramps, intersection median noses, round-a-bout entrances, sharp curves, high-risk intersections and more.
Two - Improve the conspicuity of traffic signs that must be installed extraordinarily close or far from the travel-way. The signs installed extraordinarily close to the travel-way pose a hazard to the motorists. Those installed extraordinarily far from the travel-way are difficult to detect in time to communicate their intended message to the driver.
Three – Make noticeable traffic signs that are close to the travelway, but are not facing the direction of travel. With only the post and the sign's edge or back facing the motorist, it is difficult to see and is likely struck if the motorist inte ntionally or unintentionally departs from the travel-way.

Post-Alert™ roadway sign post applications
Post-Alert™ patterns and colors


The Post-Alert™ uses a high performance retroreflective material to provide excellent nighttime visibility. Retroreflective material color and configuration options are offered to meet specific needs and either the MUTCD Object Marker or Sign Enhancement specifications. The Post-Alert's™ black base creates a significant contrast with any of the retroreflective material colors so to positively affect daytime visibility as well.


The Post-Alert™ is designed to be quickly and easily installed to most any post type. The Post-Alert™ has three pre-drilled holes that match up to most pre-punched u-channel and square posts. Various standard sign fasteners may be used to securely mount the Post-Alert™ to the existing sign post regardless of its shape or material type. With the right tools and hardware, the Post-Alert can install in as little as 5 minutes, quickly getting the installer out of traffic and harm's way.

The Post-Alert will make your roads safer for pedestrians and motorists alike by providing better visibility and conspicuity to the traffic signs that communicate to the motorists.

Post-Alert™ installation hardware
*Sign fasteners sold separately
Width Available in 4" (10.16cm) and 5" (12.7cm) widths
Length 2.5" (6.35cm)
Height 6ft (182.88cm) in height
Description The Post-Alert is constructed of high strength black High-Density Polyethylene (HDPE), an impact resistant, lightweight, recyclable material.
Specification Black, High-density polyethylene (HDPE), 180° degree C-Channel type with molded male and female fasteners on edges, (3) 5/16” diameter predrilled fastener holes, and SnapLok™ connectors to fasten two Post-Alerts™ for 360° of cover and visibility
Description High visibility retroreflective sheeting with several configuration options. Diagonal strips facing left or right that replicates MUTCD 2C.64 Object Markers and verticle markings that replicates MUTCD 2A.21 Sign Enhancement Devices
Anchors / Hardware
Mechanical Various standard sign fasteners may be used to securely mount the Post-Alert™ to the existing sign post regardless of its shape or material type including hammer rivets, standard sign bolts, and custom round post brakets. Sign fasteners sold separately.
Temperature Resistance
Function Ability to withstand extreme temperature ranges both high (190°f) and low (-40°f)

Write a review

Note: HTML is not translated!
    Bad           Good

Related Products

U-Channel Post Hardware

U-Channel Post Hardware

Bolt your Post-Alert™ directly on to a U-channel sign post. This hardware kit includes:3 nuts3 2.75"..


Square Post Hardware

Square Post Hardware

Quickly and easily attach the Post-Alert™ directly to a square sign post using these drive rivets. T..


Round Post Hardware

Round Post Hardware

Quickly and easily attach the Post-Alert™ directly to a round sign post using these screws. This har..


Tags: Roadway Safety Products, Post-Alert

Proud Members