Summary
Who this is for: Township road masters, municipal public works crews, PennDOT and Turnpike contractors, and fleet managers in Pennsylvania who are speccing warning lights for plow and maintenance trucks.
Key takeaways:
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Pennsylvania allows flashing or revolving green lights on highway construction and maintenance vehicles under 75 Pa.C.S. § 4572(b.2), added by Act 78 of 2024.
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Green is an add-on to yellow/amber, not a replacement. PennDOT's rules say green has to be part of a light-bar assembly that also contains yellow or amber lights.
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Coverage includes vehicles used by municipalities, PennDOT, and the Pennsylvania Turnpike Commission, plus contractors doing highway work for them.
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Green is optional. Nobody in Pennsylvania is required to add it.
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PennDOT's current rules are temporary and run until final regulations are adopted, no later than August 16, 2027.
What's inside:
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What Pennsylvania's green light law says
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Who can run green lights in Pennsylvania
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How green has to be set up with amber
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Why Pennsylvania added green
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What Pennsylvania buyers ask us
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Shopping Better-Viz amber/green lights
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FAQ
Green warning lights in Pennsylvania are now legal on highway construction and maintenance vehicles, as long as they run alongside the yellow/amber lights those trucks already carry. The change came with Act 78 of 2024, and it puts Pennsylvania on the growing list of states letting plow and road crews add green for better visibility in snow, fog, and low light.
Here's the short version before we get into details: green is permitted, not required, and it doesn't replace amber. The law covers specific vehicles doing highway work, not every truck with a light bar. We're a Pennsylvania-based parts supplier, and we sell Better-Viz amber/green warning lights to Pennsylvania crews, so this guide covers what the rule says and what to check before you buy.
Pennsylvania green light law: quick facts (Last reviewed: [publish date])
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Statute: 75 Pa.C.S. § 4572(b.2)
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Enabling law: Act 78 of 2024, signed July 17, 2024
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Who qualifies: Highway construction and maintenance vehicles used by municipalities, PennDOT, the Pennsylvania Turnpike Commission, and their contractors
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Amber required? Yes. Green must be part of a light-bar assembly that also contains yellow or amber lights
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Mandatory? No. Adding green is optional
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Current rules: PennDOT temporary regulation, effective September 7, 2024, in place until final rules are adopted or August 16, 2027, whichever comes first
What Does Pennsylvania's Green Light Law Allow?
Pennsylvania's vehicle code now says a highway construction and maintenance vehicle "may be equipped with one or more flashing or revolving green lights." That language lives in 75 Pa.C.S. § 4572(b.2), the section that governs visual signals on authorized vehicles.
Before Act 78, these trucks were limited to yellow/amber warning lights. The new subsection doesn't take anything away. It adds green as a second color crews can run on top of the amber they already have.
PennDOT handles the details through 67 Pa. Code § 173.3. Under the current temporary rule, green lights are allowed "when incorporated into one or more light-bar assemblies containing yellow or amber lights." PennDOT has also proposed making that rule permanent, so expect the regulation to be updated before the temporary version runs out in 2027.
Who Can Run Green Lights in Pennsylvania?
The green allowance is tied to the vehicle's job, not just who owns it. Under the statute's definition, a highway construction and maintenance vehicle covers trucks used for highway and bridge maintenance, construction, repair, snow removal, traffic control, and related work by:
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Townships, boroughs, and other municipalities
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PennDOT
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The Pennsylvania Turnpike Commission
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Contractors doing that work on their behalf
The Pennsylvania State Association of Township Supervisors (PSATS) pushed for the change and has been getting the word out to townships, which is why most of the early interest is coming from township road crews and their plow contractors.
What's not covered: a personal pickup, a private plow truck clearing parking lots, or any vehicle that isn't doing qualifying highway work. If you're a private contractor, the green allowance applies when you're working for a covered public agency, so confirm your contract covers the work before you wire in green.
Do You Still Need Amber Lights in Pennsylvania?
Yes. Green on its own isn't allowed on these trucks in Pennsylvania. PennDOT's rule requires green lights to be part of a light-bar assembly that also has yellow or amber lights.
In practice, that means keeping amber as the base of your warning setup and adding green to it. A combination amber/green light is the simplest way to do that, since both colors come in the same unit. If you're mixing separate lights, or you're not sure whether a pod, beacon, or bar on your truck meets the "light-bar assembly" language, check with your agency or give us a call before you install.
Why Pennsylvania Townships Are Adding Green
It comes down to visibility. Plow and maintenance crews work in the worst conditions on the road: blowing snow, fog, early morning dark, and traffic moving too fast for the conditions. Amber is the long-standing warning color, but it can blend into brake lights, headlights, and other amber signals on a busy highway.
Green stands out against all of that. States that went first, like Michigan and Maryland, set the model Pennsylvania followed: keep the amber drivers already recognize, and add green so crews get noticed sooner. For a township crew out at 3 a.m. with traffic coming up behind the plow, a few extra seconds of warning matters.
For a full rundown of where green and amber lights are allowed, see our green and amber warning light laws by state guide.
What Pennsylvania Buyers Ask Us
[Brian to confirm or replace with the real questions heard at the Williamsburg farm show and on phone orders. Keep the answers below only if they match what we actually tell customers.]
We sell Better-Viz lights in person at Pennsylvania events, including the farm show in Williamsburg, and the same questions come up at the table.
"Can our contractor put green on his truck too?" If he's doing qualifying highway work for your township, the statute covers contractors. Make sure the contract covers the work.
"Do we have to pull our amber lights?" No. Keep them. Green is added to amber, not swapped for it.
"Which light should we get?" Start with how the truck is set up: roof bar, cab guard, pole mount, or surface mount on the body. Then pick the amber/green unit that fits that spot. We can help you match it.
Shop Better-Viz Amber/Green Lights for Pennsylvania Plows and Maintenance Trucks
Better-Viz amber/green LED warning lights are built for the trucks doing this work: plows, dump trucks, utility bodies, and township service trucks. Every light in the line gives you amber and green output, so you're picking the size and mount that fits your truck.
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[Product card: Better-Viz model #1, restocked (100 units). Brian to confirm model]
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[Product card: Better-Viz model #2, restocked (40 units). Brian to confirm model]
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[Product cards pulled from collection: BV-21UT ultra-thin, 6" oval, low-profile beacon, post-style beacon, 26" bar]
Shop all Better-Viz amber/green warning lights
Quantities on some models are limited. If you're outfitting a full township fleet or need a bulk quote, reach out and we'll put it together.
[OPTIONAL SECTION, publish only with written approval from Brian and the customer: "Trusted by Pennsylvania agencies." Two to three factual sentences on the state or agency relationship. No implied endorsement.]
Need Help Picking the Right Light for Your Truck?
Whether you're adding green to one township plow or outfitting a whole contractor fleet, we'll help you match the right Better-Viz amber/green light to your mount and setup. Real people answer the phone, and we'll give you a straight answer on what fits.
Frequently Asked Questions About Green Warning Lights in Pennsylvania
Are green lights legal on snow plows in Pennsylvania?
Yes, on plows doing qualifying highway work. Under 75 Pa.C.S. § 4572(b.2), highway construction and maintenance vehicles, which includes snow removal, may be equipped with flashing or revolving green lights. The green has to be part of a light-bar assembly that also contains yellow or amber lights.
What is Pennsylvania Act 78 of 2024?
Act 78 of 2024 is the law that added green lights to Pennsylvania's rules for highway construction and maintenance vehicles. It was signed on July 17, 2024. PennDOT then issued a temporary regulation, effective September 7, 2024, that explains how the green lights must be displayed.
Can private contractors use green lights in Pennsylvania?
Yes, when they're doing highway construction or maintenance work for a covered public agency, such as a township, PennDOT, or the Pennsylvania Turnpike Commission. Private trucks doing unrelated work, like clearing a private parking lot, aren't covered. Confirm your contract covers the work before you add green.
Does PennDOT allow green lights on its trucks?
The statute's definition of a highway construction and maintenance vehicle includes vehicles used by PennDOT, the Pennsylvania Turnpike Commission, and municipalities, along with their contractors. Whether a specific agency chooses to add green to its fleet is up to that agency.
Can I run green lights without amber in Pennsylvania?
No. PennDOT's rule allows green lights only when they're incorporated into a light-bar assembly that also contains yellow or amber lights. Amber stays the base of the setup, and green is added to it.
Do Pennsylvania townships have to add green lights?
No. Green lights are optional. Act 78 gives townships and other covered agencies the choice to add green, but it doesn't require anyone to change their existing amber setup.
Are Pennsylvania's green light rules permanent?
The law in the vehicle code is in effect. PennDOT's display rules are currently a temporary regulation that lasts until final regulations are adopted or August 16, 2027, whichever comes first. PennDOT has proposed a permanent version, so check the current rule before equipping a vehicle.
Can I put green lights on my personal truck in Pennsylvania?
No. The green allowance applies to vehicles doing qualifying highway construction and maintenance work for covered agencies. A personal vehicle doesn't qualify, even if it has a plow or a light bar.
Do green lights on a plow mean the same thing as emergency lights?
No. Green and amber on a maintenance or plow truck is a caution signal telling drivers to slow down and give the crew room. It isn't the red or blue of a police, fire, or EMS vehicle and doesn't give the truck emergency right-of-way.
What kind of green and amber light works best for a Pennsylvania plow truck?
It depends on where you're mounting it. Roof and cab-guard setups usually take a light bar or beacon, while body and bumper spots work with surface-mount or grommet-mount lights. A combination amber/green unit keeps both colors together, which lines up with PennDOT's light-bar language. Contact us if you need help confirming the right fit for your truck.
