Drivers see blue. Drivers slow down.

IceAlert's Bluestar System^® uses temperature-sensitive reflectors that mount on standard guideposts. They act as normal delineators — until temperatures approach freezing. Then they turn blue, warning motorists of black ice before they hit it.

38°F

Shows blue when ice is possible

0 Watts

No power required

USA

Made in Oregon

USA

Made in Oregon

How bluestar works

Passive, mechanical, and visible at highway speeds.

No power, no batteries, no maintenance. Bluestar reflectors work the same way as the IceAlert pedestrian system — bimetallic temperature-sensitive indicators that change from standard reflective white to reflective blue starting at 38°F.

1

Mount on standard guideposts

Reflectors bolt to existing guideposts or new posts. Installation uses standard hardware — no pavement cuts, no wiring, no special tools. One crew can deploy a site in a single shift.

2

Normal reflectors until freezing

In warm conditions, Bluestar reflectors function as standard road delineators. Motorists see normal reflective markers. No false alarms, no ambiguity — the system is invisible until it matters.

3

Full blue at 32°F

When surface temperatures approach freezing, the bimetallic indicator turns the reflectors bright blue. Drivers see the color change well in advance of the hazard zone, giving them time to reduce speed.

The problem

Black ice is invisible. The consequences aren't.

Bridge decks, overpasses, off-ramps, and shaded curves freeze first — often while the rest of the road is clear. Drivers have no warning until they're already on it.

156k

Crashes annually in the U.S. caused by icy road conditions, per FHWA data.

1,300

Fatalities per year attributed to icy pavement — more than tornadoes and hurricanes combined.

$0

Ongoing operating cost for Bluestar. No power, no telemetry, no subscriptions, no maintenance contracts.

where to deploy

Anywhere that freezes before the rest of the road.

Bluestar reflectors are most effective in a series of 3–5, positioned well in advance of the hazard zone so drivers have time to react. Spacing matches standard guidepost reflector conventions.

MOST COMMON

Bridge Decks & Overpasses

Elevated surfaces lose heat from above and below, freezing hours before adjacent road. The #1 deployment site for Bluestar nationwide.

HIGH RISK

Off-Ramps &

Curves

Speed transitions combined with unexpected ice are the deadliest combination. Bluestar warns drivers while they're still on the straightaway.

OVERLOOKED

Shaded Road Sections

Tree cover, hillsides, and north-facing cuts create microclimates where ice persists long after surrounding pavement has cleared.

MOUNTAIN

Mountain Passes & Grades

Elevation changes mean temperature changes. Bluestar marks the transition zone where conditions shift from wet to icy.

MUNICIPAL

Known Trouble Spots

Every DOT has a list of intersections and curves that freeze first every winter. Bluestar makes the invisible hazard visible — permanently.

PRIVATE

Campus & Facility Roads

Corporate campuses, hospital access roads, university drives, and private roadways with known icing problems.