---
title: "Choosing Solar Flashing & School-Zone Signs"
description: "Static sign, 24/7 solar flasher, push-button crosswalk system or radar speed sign? A plain-English guide with real sizes, power specs and price bands."
canonical: "https://www.solarthingz.com/guides/choosing-solar-flashing-school-zone-signs"
---

![Illustration: a solar rectangular rapid-flashing beacon crosswalk system at a school crossing at dawn.](https://www.solarthingz.com/scenes/crossing-rrfb-dawn.e18dc57f-mh-640.jpg)

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Buying & compliance guide

# Choosing Solar Flashing, School-Zone & Radar Speed Signs

Updated October 2, 2026

Our signature line is **active warning** — 114 products spanning school-zone signs, solar flashing LED signs, beacons, push-button crosswalk systems and radar displays. The flashing units are self-powered: no trenching, no electrician, no power bill. This guide walks the escalation tiers, the school-zone sign set, sizing, and the power and activation options — so you spec the right level of “active” the first time.

## Pick your escalation tier

Traffic calming is a ladder: each step up buys more driver attention and costs more. Start at the cheapest tier that plausibly solves the problem — an under-used push-button system is an expensive way to do a static sign's job.

The bottom rung is the **static MUTCD sign** itself: aluminum on reflective sheeting (Engineer Grade, High Intensity Prismatic or Diamond Grade). If a passive sign is enough to mark the zone, route or crossing, that is the right buy — but this store doesn't sell static signs on their own, so source it from a sign supplier. The active tiers above it are what we sell:

| Tier | What you get | Catalog price band | Reach for it when |
| --- | --- | --- | --- |
| Solar flashing signs & beacons | The MUTCD sign plus built-in LEDs, solar panel and battery — self-contained, no trenching or AC run. | ≈$700–$2,075 | Drivers are missing the static sign — the flash buys back attention at a crossing, stop, curve or school-zone entrance. |
| Push-button & RRFB systems | Pedestrian-actuated: a push button triggers flashing signs or rapid-flashing beacon bars, in 2-, 3- or 4-sign configurations. | ≈$1,250–$7,600 | An uncontrolled crosswalk where the flash should fire only when someone is actually waiting to cross. |
| Radar driver-feedback signs | Radar unit plus an LED “YOUR SPEED” display; solar, AC or swappable-battery powered. | ≈$2,700–$7,994 | Speeding complaints on a street, campus or HOA road — showing drivers their own speed is the classic calming move. |

Price bands run from the cheapest to the dearest configuration of the new (non-clearance) units in each tier, so they span size and option choices; every price on this page is rounded to the dollar — see each product page for exact pricing. Where each device type is _allowed_ (RRFBs, in-street signs, flashing speed limits) is set by the MUTCD and your state supplement — verify placement with your state or local traffic authority.

## The school-zone sign set

A school zone is specced as a **set**, not a single sign: advance warning in, posted limit with its qualifier plaque, the crossing itself, and an end-of-zone sign out. This store sells the solar flashing S1-1 and S5-1; the static signs, plaques and in-street paddles in the set are not sold here, so plan to source them separately.

| Code | Sign | Role in the zone | On this site |
| --- | --- | --- | --- |
| `S1-1` | School crossing | Marks the crossing itself | [Solar flashing, 24–36″](https://www.solarthingz.com/shop/solar-flashing-safety-signs) |
| `S4-5A` | School Speed Zone Ahead | Advance warning before the zone | Not sold here — source separately |
| `S5-1` | School Speed Limit | Posts the reduced limit | [Solar flashing, 24″×48″](https://www.solarthingz.com/products/speed-limit-school-sign-with-mph) |
| `S4-1P` · `S4-6P` · `S4-2P` · `S4-4P` | Qualifier plaques | When the limit applies — times, days, “When Children Are Present”, “When Flashing” | Not sold here — source separately |
| `S5-2` · `S5-3` | End School (Speed) Zone | Closes the zone — S5-2 ends the zone, S5-3 ends the reduced limit | Not sold here — source separately |
| `R1-6B` | In-Street Schoolchildren Crossing | Centerline yield paddle at the crosswalk | Not sold here — source separately |

School-series signs are commonly specced in **fluorescent yellow-green (FYG)** sheeting rather than standard yellow — our school and crossing signs offer both (including Diamond Grade FYG), so match whatever your plan set or state supplement calls for.

Ready to escalate? The [LED flashing school-crossing signs](https://www.solarthingz.com/shop/solar-flashing-safety-signs) (24–36″, ≈$800–$1,600) replace the static S1-1, and the [24″×48″ flashing School Speed Limit sign](https://www.solarthingz.com/products/speed-limit-school-sign-with-mph) (≈$1,700, choose 15/25/35 MPH or custom) pairs naturally with an `S4-4P` “When Flashing” plaque, sourced separately — its solar configuration ships with a timer included. Confirm your zone's flashing hours and operation rules with the local authority.

## Sizing a flashing sign

The three most-specced flashing families — school crossing, crosswalk and stop — each come in **24″, 30″ and 36″**. The MUTCD sets minimum sign sizes by road class, so the faster and wider the road, the larger the panel; when sight distance is marginal, step up a size. Here's the real price ladder (starting prices):

| Size | School crossing | Crosswalk | Stop |
| --- | --- | --- | --- |
| 24" | from $800 | from $800 | from $800 |
| 30" | from $1,000 | from $900 | from $900 |
| 36" | from $1,500 | from $1,500 | from $1,400 |

Already own compliant signs? Solar flashing **retrofit kits** — in [rectangle](https://www.solarthingz.com/products/24-x-30-solar-flashing-led-rectangle-retrofit-kit-for-traffic-safety-signs), [diamond](https://www.solarthingz.com/products/24-solar-flashing-led-diamond-retrofit-kit-for-traffic-safety-signs) and [octagon](https://www.solarthingz.com/products/24-solar-flashing-led-octagon-retrofit-kit-for-traffic-safety-signs) frames, ≈$700–$1,725 — add perimeter LEDs to an existing panel instead of replacing it.

## Power, batteries & activation

Nearly everything in this category is **solar by default**: 5 W and 8 W / 12 V monocrystalline panels on the standard flashing signs, 15 W/18 V on the Helios perimeter-LED line, and 18–20 W on the RRFB systems. Battery packs scale the same way — from 4,400 mAh lithium on the smaller flashing signs to 6,600 mAh on many 24–30″ units, 7,200 mAh in the 12″ beacons and 8,800 mAh in the RRFB systems. Radar signs are the exception that gives you a choice: every EV/SP model offers **solar or AC power**. The solar option charges a lead-acid battery on every model except the SP550, whose solar option is lithium-ion, and the EV11, EV12 and SP100 can instead run on swappable rechargeable lithium-ion packs — order the spare pack to rotate charge with zero downtime.

How the flash is triggered is a spec line, not an afterthought:

-   **24/7** — the default operating mode on solar flashing signs and beacon kits
-   **Timer** — an option on the 8″/12″ beacon kits, and included with the solar configuration of the school-crossing and school-speed-limit flashers (school zones usually flash on a schedule)
-   **App-controlled** — the Helios line is Bluetooth-controlled via the “TT Solar” app, with a timer function (and dimming on most units)
-   **Dusk-to-dawn** — available on the double-head warning beacons
-   **Push-button** — pedestrian-actuated crosswalk systems and RRFBs flash only on demand

## Radar driver-feedback signs

This store carries 8 radar models, from the [11″ “Your Speed” sign](https://www.solarthingz.com/products/11-your-speed-solar-powered-led-radar-speed-sign) (11″-high two-digit LED display, ≈$2,700) through the mid-range [SP100](https://www.solarthingz.com/products/led-solar-power-radar-speed-sign) (≈$2,975–$4,000, in solar, AC or swappable-lithium trim) and the EV11–EV18 series to the SP700 (≈$7,194–$7,994). The [SP550 variable speed limit sign](https://www.solarthingz.com/products/solar-powered-variable-speed-limit-driver-feedback-sign) combines a driver-feedback display with a changeable posted limit (50 W solar panel option). Bigger display, longer legibility distance — match digit height to approach speed the same way you size a sign panel.

!

Spec tip

A mid-block crossing usually needs to face both approaches — the flashing school-crossing signs and push-button crosswalk systems come in back-to-back and 3- or 4-sign configurations, and pricing a 4-sign system per-sign misses the shared controller. Send us the crossing count, posted speed and power situation and we'll config the system for you.

## Shop active warning

-   [Solar Flashing LED Safety Signs](https://www.solarthingz.com/shop/solar-flashing-safety-signs) — the full self-powered flashing line
-   [Pedestrian & School Zone Safety](https://www.solarthingz.com/shop/pedestrian-school-zone-safety) — S-series signs, crossings & RRFBs
-   [Speed Management & Driver Feedback](https://www.solarthingz.com/shop/speed-management-driver-feedback) — radar & speed-limit signs
-   [R1-1 Stop Signs](https://www.solarthingz.com/collections/r1-1-stop-signs) — solar flashing stop signs
-   [Solar Traffic Signs](https://www.solarthingz.com/collections/solar-traffic-signs) — flashing crosswalk, yield, do-not-enter, wrong-way & warning signs, plus retrofit kits
-   [Helios Series](https://www.solarthingz.com/collections/helios-series) — perimeter-LED stop, crosswalk & speed-limit signs
-   [Push Button Systems](https://www.solarthingz.com/collections/push-button-systems) — pedestrian-actuated crosswalk systems
-   [Flashing Beacons](https://www.solarthingz.com/collections/flashing-beacons) — 8″/12″ beacon kits & RRFBs
-   [Speed Radar Signs](https://www.solarthingz.com/collections/speed-radar-signs) — driver-feedback displays

Speccing a corridor, campus or district-wide rollout? [Contact us](https://www.solarthingz.com/contact) with your crossing list, posted speeds and quantities for a formal municipal quote.

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Generated at build time from https://www.solarthingz.com/guides/choosing-solar-flashing-school-zone-signs. Site guide for AI agents: https://www.solarthingz.com/llms.txt — full-site markdown: https://www.solarthingz.com/llms-full.txt