In traffic and ITS equipment, the linear actuator is rarely the headline component — but it is usually the one that decides whether a crew can deploy a mast arm in 60 seconds, whether a message board survives a winter on the shoulder of an interstate, and whether the whole unit still works on battery after 30 days without sun. The actuator specification that matters is not thrust alone. It is the combination of duty at low temperature, ingress protection, holding load under wind, current draw on a solar budget, and end-of-travel feedback. This guide covers all five, with the actual standards your customers will quote back at you.

Why traffic equipment builders are moving to electric actuation

This is not a speculative market. Electric linear actuators are already inside shipping traffic products from multiple OEMs:

Sources: North America Traffic, Superior Traffic Services, JTI, Ver-Mac TM-548, Wanco, TecHome, LINAK.

Note that hydraulics have not disappeared: TAPCO's SQ3TS portable signal still uses a hydraulic lift system. Both architectures ship today. We compare them properly in Portable Traffic Signal Mast Lift: Electric Actuator vs Hydraulic vs Winch.

The three commercial drivers

1. Deployment time is a safety metric. Every minute a technician spends cranking a winch at the roadside is a minute of exposure to live traffic. Pushbutton deployment removes the operator from the hazard zone — which is why Ver-Mac markets "auto up/down" and TAPCO markets "no failure-prone cables or winches."

2. Solar and battery autonomy. Portable signal trailers are designed to run for weeks off-grid — the PTL2.4x carries a 400 W array and 12–16 AGM batteries for up to 30 days without sun. A hydraulic power unit's inrush current is a real constraint on that energy budget. An electric actuator draws current only while moving.

3. Maintenance and cold-weather reliability. No fluid, no seals to weep onto a roadway, no viscosity shift at −20 °C. For a fleet of rental trailers, that is the difference between a service call and a no-touch season.

The standards your customers will specify

If you sell actuators into this market, these are the documents that appear in your customer's RFQ. Knowing them is most of the sale.

NEMA TS 5 — Portable Traffic Signal Systems

NEMA TS 5-2021 is the standard for portable traffic signal systems. Its scope, as published, covers "traffic signaling equipment used to enable and expedite the safe movement of vehicle traffic and the work that goes on in a work zone."

TS 5 governs the system, not your actuator directly — but the mast-lift actuator lives inside a TS 5-compliant unit, and manufacturers advertise compliance prominently (RoadSafe's TR2 is marketed as "fully compliant with NEMA TS-5"; North America Traffic states the PTL2.4x is "compliant with both the MUTCD and NEMA TS-5 standards"). Your component must not be the reason a system fails its qualification.

NEMA TS 2 — the environmental envelope that actually filters suppliers

This is the hard gate. NEMA TS 2 Section 2 defines environmental and operating conditions for traffic control equipment, including temperature, humidity, vibration and shock. The temperature envelope repeatedly written into agency specifications is:

−34 °C to +74 °C (−30 °F to +165 °F)

That figure appears in the City of Concord signal specification, a TxDOT flasher specification, and many others. FDOT requires detectors to meet "the humidity, vibration, and shock tests described in NEMA TS2, Sections 2.2," and Indiana DOT requires equipment "tested in accordance with… NEMA TS2-2 including shock and vibration."

Be honest with yourself about this number. Most commercial linear actuators — including much of the general-purpose market — are catalogued at roughly −15 °C to +45 °C. That is an indoor-to-mild-outdoor rating. It does not meet the NEMA TS 2 envelope, and a competent OEM buyer will find that out during qualification, not after.

If you are sourcing for a North American roadside product, ask every supplier three questions in writing:

1. What is the cold-start current draw and no-load speed at −34 °C, not just the storage rating?
2. Which grease specification is used, and what is its pour point?
3. Can you supply a test report, or only a datasheet claim?

A supplier that answers with a report is engineering. A supplier that only restates the datasheet is reselling.

MUTCD 11th Edition — why stroke length is a compliance issue

The MUTCD 11th Edition (2023) is now the legal standard; states were required to adopt it by January 18, 2026.

Section 4D.09, Mounting Height of Signal Faces, sets the geometry your actuator has to deliver:

• Over a usable roadway: bottom of the signal housing at least 15 ft above the pavement
• Not over the roadway: at least 8 ft above the sidewalk or pavement grade
• Near-side, over a median island: at least 4.5 ft
• Guidance: top of housing over the roadway no more than 25.6 ft

This converts directly into an actuator requirement. Superior Traffic Services quotes a top signal clearance of 17 ft 6 in to 19 ft 0 in on its PTS-1000A. The actuator's stroke, plus the mast's mechanical advantage, must reach the compliant height reliably — including at the low end of battery voltage and the low end of the temperature range, when speed and force both degrade.

EN 12966 and EN 12368 — the European path

For the EU market, EN 12966 covers variable message traffic signs and EN 12368:2024 covers signal heads. Ver-Mac, for example, certifies products to EN 12966.

One useful detail for component suppliers: EN 12966 explicitly excludes sign gantries, cantilevers, posts, supports and foundations from its scope. The lifting mechanism is therefore not certified by the VMS standard itself — it falls to the equipment builder, and by extension to you, to demonstrate structural and environmental fitness. That is an opportunity, not a loophole: bring the evidence and you shorten your customer's qualification cycle.

Specifying the actuator: five parameters that decide the design

1. Force — size for wind and moment, not for static weight

The mass of a signal head or sign panel is the easy part. The governing case is the moment load at the deployed position under wind, plus the shock of a gust arriving while the mechanism is mid-stroke.

Published wind ratings give you the real design target. Ver-Mac's TLD-3612 G3 trailer and Superior Traffic Services' Truss Signal are both rated to a 90 mph wind load (Trafficsupply, STS). TAPCO claims 100 mph sustained / 110 mph gusts for the SQ3TS. There is no single standardised wind figure across the industry — 90 mph is the common verifiable benchmark, and individual manufacturers claim higher. Design to your customer's stated number, and ask them to state it.

For tilt-frame sign applications, Wanco publishes a 500 lb (226.8 kg) capacity across dual actuators — a useful reality check that these are not light-duty loads.

Full wind-load and moment calculations are worked through in Sizing a Linear Actuator for VMS / PCMS Sign Tilt Frames.

2. Ingress protection — IP66 is the working minimum

Per IEC 60529, IP66 means dust-tight plus protection against powerful water jets. For roadside equipment exposed to rain, road spray, and pressure-washing between deployments, IP66 is the sensible floor; IP67 adds temporary immersion, which matters for units that sit in standing water or snowmelt at the shoulder.

IP69K — close-range, high-pressure, high-temperature washdown — is genuinely useful for vehicle-mounted equipment that goes through wash bays, but it is over-specified for a static trailer.

A caution worth stating plainly: an IP rating is a test result, not a marketing adjective. If it matters to your application, ask for the test report. We wrote about how that testing actually works in Ingress Protection Testing of Industrial Actuators, and about choosing between grades in IP66 vs IP54 Waterproof Linear Actuator.

3. Duty cycle — deployment duty is gentle, and that is the point

A mast lift runs for perhaps 30–60 seconds, twice per deployment, then sits idle for days or weeks. Compare that to a solar tracker or an agricultural implement cycling hundreds of times a day.

A typical industrial actuator duty rating of 10% (2 min on / 18 min off) is comfortably sufficient here — deployment duty is one of the least thermally demanding actuator applications in the catalogue. The design risk is not overheating; it is long dwell followed by a demand for guaranteed motion in bad weather. That shifts the engineering emphasis to sealing, corrosion resistance, grease longevity and self-locking under static load. Background reading: Linear Actuator Duty Cycle Explained.

4. Power and current draw — the solar energy budget

Portable signal and VMS trailers are 12 V or 24 V DC battery systems with solar assist — 400 W and 12–16 batteries on the PTL2.4x, 520 W and 16 batteries on the SQ3TS. Two consequences for actuator selection:

• Voltage match. 24 V DC is the common bus. A 24 V actuator that also tolerates 12 V gives an OEM one part number across two platforms.
• Peak inrush matters more than average draw. With a deep-cycle bank near the end of a cloudy week, a high-inrush motor can sag the bus enough to reset a controller. Ask for stall and startup current, not just rated current.

For any application with two actuators moving one frame (Wanco's dual-actuator tilt frames, for instance), synchronisation is a hard requirement — mechanical binding from mismatched extension is a common field failure. See How to Sync Two Linear Actuators.

5. Feedback and end-of-travel protection

Ver-Mac's own sales literature makes this explicit: the actuator's "integrated limit switch prevents motor gear wear and tear." For unattended, remotely-triggered equipment, end-of-travel protection is not a nicety — it is what stops a stalled motor from cooking itself when a mechanism ices up.

Choose based on control architecture:

More detail in Precision in Motion: Linear Actuators with Position Feedback.

Where JDR actuators fit — and where they need engineering work

We would rather give you an accurate answer than an easy one.

Our Industrial Actuator Series is the relevant family for outdoor traffic equipment. Published specifications:

All are rated at 10% duty (2 min on / 18 min off) with internal limit switches. The Industrial Series models carry CE and UL marks; the FY019 is listed as CE and RoHS. The series offers Hall-effect and potentiometer feedback options and customisable stroke.

The honest caveat: our standard catalogue temperature rating is −15 °C to +45 °C. That is short of the NEMA TS 2 envelope of −34 °C to +74 °C. For a mild-climate deployment, a vehicle-mounted sign that lives in a heated depot, or a market outside North American DOT procurement, the standard product is a straightforward fit. For a roadside unit that must survive a Minnesota or Alberta winter, it is not — and we will tell you that before you order, not after. Extended-temperature builds are an engineering discussion: grease specification, capacitor selection, and a cold-start test report. If that is your requirement, talk to our engineering team and ask for the low-temperature validation data.

Also note that indoor-rated families — the Standard Series (IP43), FY014 (IP20) and the Lifting Column Series — are not suitable for exposed roadside duty regardless of how attractive the force figures look.

Frequently asked questions

Can a standard industrial linear actuator be used on a portable traffic signal?

Mechanically, usually yes — deployment duty is light and forces are modest relative to industrial catalogue ratings. Environmentally, often no. The filter is the NEMA TS 2 temperature envelope (−34 °C to +74 °C) and IP66-or-better sealing. Verify those two before anything else.

What IP rating does roadside traffic equipment need?

IP66 as a practical minimum for exposed outdoor equipment; IP67 where standing water, snowmelt or immersion is credible. IP69K is worth specifying only for vehicle-mounted equipment subjected to high-pressure washdown.

Are electric actuators strong enough to replace hydraulic mast lifts?

Yes for the load ranges seen in portable signals and sign tilt frames — industrial actuators are available well beyond the required force. The genuine trade-offs are speed under load, holding behaviour, and cost, which we cover in the mast lift comparison.

How high does a portable traffic signal have to reach?

Per MUTCD 11th Edition Section 4D.09, at least 15 ft above the pavement for a signal face over a usable roadway, and at least 8 ft where not over the roadway. Confirm the requirement with the specifying agency, then size stroke and mast geometry to reach it with margin.

Does a mast-lift actuator need position feedback?

Not always. Two-position deploy/stow duty is well served by internal limit switches. Add Hall-effect feedback when two actuators move one frame, when a controller must confirm state remotely, or when you want fault detection on a jammed mechanism.

Talk to an engineer, not a catalogue

JDR has manufactured electric linear actuators since 2004 from Wuxi, China, shipping to 78 countries under an ISO 9001 system. We build to drawing: stroke, connector, feedback type, voltage and sealing are all specifiable.

If you build portable signals, message boards, work-zone vehicles or ITS roadside equipment, send us your deployed height, panel area, worst-case wind speed, ambient temperature range and bus voltage — we will come back with a sizing proposal and a clear statement of what we can and cannot certify today.

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