RADROAD-APEX — Illuminated Traffic Signs

Sign on, sign off

Tap a photo to compare.

APEX I Alpha Unit STOP sign lit in heavy fog from about 100 ft, with a standard STOP sign behind it — ~100 ft, 8x zoom, heavy fog.

APEX I Alpha Unit STOP sign unlit in heavy fog from about 100 ft, with a standard STOP sign behind it — ~100 ft, 8x zoom, heavy fog.

APEX I Alpha Unit STOP sign lit, seen from below with a streetlight in fog — Close range.

Power on

APEX I Alpha Unit

Front view.

APEX I Alpha Unit

From below.

From 100 to 500 feet

Heavy fog. Phone cameras record less detail than the eye at long range.

APEX I Alpha Unit STOP sign lit in heavy fog from about 100 ft — 8x zoom.

Street in heavy fog at blue hour with the lit APEX I Alpha Unit visible about 300 ft away — No zoom. The sign is the red light at the end of the street.

Lit APEX I Alpha Unit visible through dense fog from about 500 ft — 8x zoom, dense fog.

Applications

One platform for the whole sign line

Each photo shows a lit APEX I Alpha Unit. Tap a photo to enlarge it.

R1-1 STOP

Intersections

STOP, speed limit and other regulatory signs. The legend and background light from behind the sign face.

R5-1 DO NOT ENTER

Wrong-way entry

DO NOT ENTER and WRONG WAY signs on off-ramps.

OptionRadar-triggered brightness step-up with APEX II.

W1-8 Chevron Alignment

Curves

Chevrons and curve warning signs on the outside of a curve.

OptionChevrons that light in sequence through the curve.

W11-2 Pedestrian Crossing

Pedestrian crossings

Crossing signs at signals and mid-block crossings.

OptionFlashing face, detection-triggered with APEX II.

W20-1 · W21-1 · W20-7a

Work zones

Portable ROAD WORK AHEAD, worker and FLAGGER signs on battery or solar power.

More than half of fatal U.S. work-zone crashes in 2024 happened at night.FHWA, 2026 National Work Zone Awareness Week fact sheet

Also configured for

Overhead and tunnelGantry and tunnel-ceiling signs for speed limit and lane control.
TMA trucksSigns mounted on truck-mounted attenuators for work convoys. 12–24 VDC.
Light barStandalone light bar with exchangeable red/blue, amber or custom faceplates.

Ask about your application →

Some options will be available at a later date. APEX II and APEX III are coming in 2027.

Construction

Built for the roadside

Rails on the back pan clamp to a perforated square steel post. The power cable leaves the back pan and runs down the post.

Back of an APEX I Alpha Unit STOP sign: aluminum back pan with two mounting rails clamped to a perforated square steel post, power cable running down the post — Back pan, mounting rails and post.

Close-up of a U-bolt clamping an APEX I Alpha Unit mounting rail to a perforated square steel post — U-bolt at the post.

Close-up of the power cable leaving the APEX I Alpha Unit back pan through a fitting beside the post — Cable exit at the bottom of the back pan.

APEX I Alpha Unit R1-1 STOP sign on its post, three-quarter view showing the housing edge — Aluminum housing, polycarbonate face.

Macro view of retroreflective sheeting on a lit APEX I Alpha Unit pedestrian crossing sign — Retroreflective sheeting, lit from behind.

APEX I sign types

APEX I Alpha Unit R1-1 STOP sign at low LED brightness, front view — R1-1 STOP, low LED brightness.

APEX I Alpha Unit R1-1 STOP sign at high LED brightness, front view — R1-1 STOP, high LED brightness.

APEX I Alpha Unit R1-1 STOP sign, lit, in heavy fog with a standard STOP sign behind it — R1-1 STOP, standard STOP sign behind. 6.9x zoom.

APEX I Alpha Unit R1-1 STOP sign, lit, at the corner in heavy fog under a streetlight — R1-1 STOP, heavy fog. 2.2x zoom.

APEX I Alpha Unit W20-1 ROAD WORK AHEAD sign, lit at night on a portable stand — W20-1 ROAD WORK AHEAD.

APEX I Alpha Units: W21-1 worker sign and W20-1 ROAD WORK AHEAD sign, lit at night — W21-1 worker and W20-1 ROAD WORK AHEAD.

APEX I Alpha Unit R5-1 DO NOT ENTER sign, lit, front view — R5-1 DO NOT ENTER, lit.

APEX I Alpha Unit W1-8 Chevron Alignment sign, lit, front view — W1-8 Chevron, lit.

APEX I Alpha Unit W1-8 Chevron Alignment sign, lit, in low room light — W1-8 Chevron, low room light.

APEX I Alpha Unit W1-8 Chevron Alignment sign, lit, close view — W1-8 Chevron, close view.

APEX I Alpha Unit W11-2 Pedestrian Crossing sign, lit, on a black background — W11-2 Pedestrian Crossing, lit.

APEX I Alpha Unit W11-2 Pedestrian Crossing sign, unlit, in room light — W11-2 Pedestrian Crossing, unlit.

APEX I Alpha Unit FLAGGER AHEAD work zone sign, lit, front view — W20-7a FLAGGER AHEAD, lit.

APEX I Alpha Unit FLAGGER AHEAD work zone sign, lit, in low room light — W20-7a FLAGGER AHEAD, low room light.

WRONG WAY photos coming soon.

The APEX line

Every APEX sign shares one platform. Add detection and connectivity as needed.

APEX I

Illuminate

Even, uniform luminance behind retroreflective sheeting. Designed to revert to a standard retroreflective sign if power fails. Legend legible at ≥ 500 ft.

Pilot

View APEX I →

APEX II

Detect

Radar vehicle detection. The sign responds to approaching traffic. Configurable trigger zones.

Coming 2027

View APEX II →

APEX III

Connect

Cellular telemetry and tamper alerts, monitored from one dashboard. Mesh coordination for multi-sign systems.

Coming 2027

View APEX III →

RADROAD-APEX technology is patent pending.

Platform Specifications

Baseline values across the platform.

Parameter	Specification	Notes
Illumination	Internally illuminated	Uniform luminance across all sign sizes
Sign Face	ORAFOL ORALITE® retroreflective sheeting	ASTM D4956 · Designed to revert to a standard retroreflective sign if power fails
Sign Sizes	30" to 10'+ scalable	Modular parametric design
Wind Load (target)	150 mph	Per AASHTO LRFDLTS-1
Operating Temp (target)	−40°F to +135°F	Continuous
Design Life (target)	10 years	Design service life
Power Options	100–277 VAC (APEX I) · 12–24 VDC · Solar + battery	Application-dependent
Detection (APEX II+)	Radar detection	Configurable zones
Connectivity (APEX III)	LTE-M / NB-IoT cellular	Telemetry + fleet monitoring
Electrical Safety	Designed and engineered to conform with the technical safety requirements of UL 48, Standard for Electric Signs.	See Compliance
EMC	Designed to meet FCC Part 15	Emissions testing planned for late 2026
Standards (target)	MUTCD 11th Edition	Design target
Buy America	BABA compliant	Documented domestic sourcing

Design targets, subject to change. Production values are confirmed through certification testing.

Why RADROAD-APEX

Fail-Safe Visibility

Retroreflective sheeting on every face. The sign still works without power.

Built for Crews

Fast setup, gloved-hand operation, standard mounts and clear status indicators.

Dark-Sky Friendly

Minimum effective luminance. Less glare and light pollution.

Serviceable

Field-swappable faces, power modules and controllers.

BABA Compliant

Domestic manufacturing with documented sourcing for federal-aid projects.

Warranty-Backed

5-year warranty target. Designed for UV, salt, vibration, temperature cycling and impact.

Need a configuration for your deployment?

Contact us for specifications and pilot details.

Request Pilot

Internally illuminated traffic signs.