# Dual Circuit Brake System Market

> Dual-Circuit Brake System Market Research Report By Vehicle Type (Passenger, Commercial) and By Regional (North America, Europe, South America, Asia Pacific, Middle East and Africa)- Forecast to 2035

- **Forecast Period:** 2026-2035
- **CAGR:** 6.5%
- **2025:** USD 455.8 Million
- **2035:** USD 855.6 Million
- **Key Players:** Robert Bosch GmbH, Continental AG, ZF Friedrichshafen AG, Aisin Corporation, Hitachi Astemo, Ltd., Knorr-Bremse AG, HL Mando Corporation, Brembo S.p.A.

**Report ID:** MRFR/AT/40433-HCR · **Pages:** 128 · **Author:** Abbas Raut & Sejal Akre · **Last Updated:** October 27, 2026

**URL:** https://www.marketresearchfuture.com/reports/dual-circuit-brake-system-market-42097

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## Market Summary

## Dual Circuit Brake System Market Summary

The Dual Circuit Brake System Market was valued at USD 455.8 Million in 2025 and is projected to reach USD 485.4 Million in 2026, expanding to USD 855.6 Million by 2035 at a CAGR of 6.5% over 2026–2035. Two regulatory forces anchor this trajectory. The EU General Safety Regulation (GSR2) became mandatory for all newly registered vehicles in July 2024 [7], and the US NHTSA finalized FMVSS No. 127 in 2024, requiring automatic emergency braking on [light vehicles](https://www.marketresearchfuture.com/reports/light-vehicle-market-23154) by September 2029 [10]. Both rules raise the performance bar for the hydraulic foundation that every electronic braking function ultimately depends on.

Technology inside the segment is shifting from purely mechanical tandem master cylinders toward electrohydraulic and decoupled brake units that keep two independent hydraulic circuits as a fallback path. This redundant braking technology now sits beneath ESC, AEB, and regenerative blending systems rather than operating alone. Electric vehicle sales exceeded 17 million units in 2024, more than one in five new cars sold globally [13], and each of those platforms needs a brake system able to blend motor torque with friction braking across split circuits.

North America leads with a 34.5% share in 2025, supported by decades of federal brake standards and a large light-truck fleet. Asia-Pacific is the fastest-growing region at a 7.6% CAGR, driven by vehicle production in China and India, while Europe ranks third by share but carries the most demanding type-approval regime. Over the next decade, growth will track safety regulation in emerging economies and the redesign of brake hardware for electric and automated vehicles.

## Key Report Takeaways

### • By Vehicle Type

- Passenger vehicles hold a 61.5% share of the Dual Circuit Brake System Market in 2025, reflecting universal fitment across global car production.
- [Commercial vehicles](https://www.marketresearchfuture.com/reports/commercial-vehicle-market-34525) are the faster-growing category at a 7.1% CAGR, supported by heavy-vehicle AEB rulemaking and freight fleet renewal.

### • By Region

- North America accounts for a 34.5% share of the Dual Circuit Brake System Market, the largest of any region
- Asia-Pacific posts the highest regional CAGR at 7.6%, led by China's production base and India's tightening safety norms
- Europe generated USD 111.7 million in 2025, with demand shaped by UN R13-H and GSR2 compliance

## Market Size and Forecast (2021–2035)

The Dual Circuit Brake System Market estimates below combine supplier revenue tracking for tandem master cylinders, split-circuit valves, and integrated brake control units with vehicle production data from OICA [12] and regional registration statistics. Historical values for 2021–2024 reflect reported production volumes, while forecast values apply calibrated adoption rates by vehicle type and region, validated through primary interviews with brake suppliers and OEM purchasing teams.

## Market Drivers

## Driver Impact Analysis

| Driver | ~% Impact on CAGR | Geographic Relevance | Impact Timeline | Ref |
| --- | --- | --- | --- | --- |
| Brake performance regulation and type approval | +1.4% | Global | Long-term (≥4 yr) | [4][6][7] |
| Global road fatality burden and safety targets | +1.2% | Asia-Pacific, Africa, Latin America | Long-term (≥4 yr) | [1][17] |
| AEB and ADAS mandates | +1.0% | North America, Europe | Medium-term (2–4 yr) | [10][11] |
| Electric vehicle platform growth | +0.9% | China, Europe, North America | Medium-term (2–4 yr) | [13] |
| Vehicle production volumes | +0.8% | Global | Short-term (≤2 yr) | [2][12] |
| Emerging-market NCAP programs | +0.7% | India, ASEAN, Latin America | Medium-term (2–4 yr) | [15] |
| Freight infrastructure investment | +0.6% | North America | Medium-term (2–4 yr) | [16] |

### Brake Performance Regulation and Type Approval

Dual hydraulic circuits have been a regulatory baseline since the late 1960s, when US rules began requiring split braking on new passenger cars. Today FMVSS No. 105 and No. 135 in the US [18][4] and UN Regulation No. 13-H in UNECE markets [6] specify partial-failure stopping distances that a single-circuit design cannot meet. Every new platform, including electric and automated vehicles, must pass these tests, which locks dual-circuit content into each vehicle program regardless of powertrain.

### Global Road Fatality Burden and Safety Targets

Road crashes kill 1.19 million people each year, and they remain the leading cause of death for people aged 5 to 29 [1]. The UN General Assembly set a goal of halving road deaths by 2030 [17]. India recorded 168,491 road fatalities in 2022 [14], pushing authorities toward stricter vehicle safety norms. These pressures accelerate brake upgrades in markets where older, lower-specification vehicles still dominate the fleet.

### AEB and ADAS Mandates

NHTSA estimates FMVSS No. 127 will save at least 360 lives and prevent about 24,000 injuries annually once AEB is fitted across light vehicles [10]. A 2023 proposal extends AEB to heavy vehicles above 10,000 lb gross weight [11]. Automatic braking functions issue commands through the hydraulic circuits, so suppliers must deliver faster pressure build and robust fallback behavior, raising the value of each installed system.

### Electric Vehicle Platform Growth

Sales of electric vehicles exceeded 17 million in 2024, accounting for more than 20% of all new automobile sales worldwide [13]. Electric platforms rely on electrohydraulic or decoupled braking units that maintain two circuits as a backup because they lack engine vacuum for traditional boosters. Even when unit volumes remain constant, the average selling price of these units is higher than that of tandem master cylinders with vacuum boosters, increasing revenue per vehicle.

### Vehicle Production Volumes

Global vehicle production stayed above 90 million units in both 2023 and 2024 [12]. China's car market grew 4.5% in 2023, while sales in Japan and the US rose by roughly 16% and 14% respectively [2]. Because dual-circuit systems are fitted to virtually every new car and truck, near-term demand moves closely with assembly volumes.

### Emerging-Market NCAP Programs

India's Bharat NCAP took effect in October 2023, giving buyers star ratings for vehicles up to 3.5 tonnes [15]. Star-rating programs reward ESC and better braking hardware, encouraging OEMs to upgrade base specifications on entry-level models. Similar consumer-testing pressure in ASEAN and Latin America widens the addressable base for higher-value split-circuit modules.

### Freight Infrastructure Investment

The US Bipartisan Infrastructure Law commits about USD 1.2 trillion to transport and infrastructure, including highway safety programs [16]. Higher freight activity and road [construction](https://www.marketresearchfuture.com/reports/construction-market-16065) lift demand for heavy trucks, vocational vehicles, and trailers. Each of these platforms uses dual-circuit air or hydraulic braking, supporting replacement and new-fit volumes in commercial categories.

## Restraints

## Restraints Impact Analysis

The restraint impacts below are directional estimates of downward pressure on the Dual Circuit Brake System Market CAGR. They are not additive and partially offset the drivers in Section 4.

| Restraint | ~% Impact on CAGR | Geographic Relevance | Impact Timeline | Ref |
| --- | --- | --- | --- | --- |
| Saturated fitment in mature markets | −0.6% | North America, Europe, Japan | Long-term (≥4 yr) | [4][6] |
| OEM price pressure and raw material volatility | −0.5% | Global | Short-term (≤2 yr) | [19][21] |
| Long-term shift toward electromechanical braking | −0.4% | Europe, China | Long-term (≥4 yr) | [21] |
| Supply chain and semiconductor disruption | −0.4% | Global | Short-term (≤2 yr) | [12] |
| Low-cost and counterfeit aftermarket parts | −0.3% | Asia-Pacific, Africa, Latin America | Medium-term (2–4 yr) | [14] |

### Saturated Fitment in Mature Markets

Split-circuit braking has been standard in US and European vehicles for decades [4][6]. Penetration in these regions is effectively complete, so growth depends on production volume and content upgrades rather than new adoption. Flat or declining car output in Europe and Japan therefore caps unit growth for suppliers concentrated in those markets.

### OEM Price Pressure and Raw Material Volatility

Brake hardware relies on aluminum, cast iron, and steel, whose prices swung sharply between 2021 and 2023. Tier-1 suppliers have reported margin pressure as OEMs resist cost pass-through in annual price negotiations [19][21]. Smaller component makers with limited purchasing scale feel this squeeze most, which can delay investment in new product lines.

### Long-Term Shift Toward Electromechanical Braking

Dry brake-by-wire concepts using electromechanical calipers aim to remove hydraulic fluid from the vehicle entirely [21]. If these systems reach volume production in the 2030s, they would replace hydraulic circuit hardware with redundant electrical paths. Current regulations still favor hydraulic fallback, but the direction of travel limits long-horizon upside for conventional components.

### Supply Chain and Semiconductor Disruption

According to industry projections, chip shortages will result in a loss of more than 10 million vehicles in 2021 [12]. Any recurrence would first affect higher-value systems since integrated braking units rely on microcontrollers and pressure sensors. In response, suppliers have increased working-capital expenses through multiple sourcing and inventory buffers.

### Low-Cost and Counterfeit Aftermarket Parts

Unbranded master cylinders and brake lines are a major source of supply for price-conscious aftermarkets in South Asia, Africa, and some regions of Latin America. India's crash data shows that these parts increase safety concerns and undercut certified providers on price [14]. The aftermarket income of branded suppliers is restricted by lax policing in independent repair channels.

## Opportunities

## Dual Circuit Brake System Market Opportunities

### Safety Upgrades in Emerging Markets

India, ASEAN, and Brazil combine rising vehicle production with tightening safety rules. Bharat NCAP [15] and regional consumer-testing programs encourage OEMs to fit ESC-ready split-circuit hardware on entry-level cars. Suppliers that localize production of brake modules can win share from imports while meeting cost targets, particularly in India, the fastest-growing country market at a 9.2% CAGR.

### Decoupled Brake Units with Hydraulic Fallback

Decoupled and integrated brake units combine pedal simulation, electronic pressure control, and a mechanical backup circuit in one module. They suit electric and hybrid vehicles that need precise regenerative blending [13]. Suppliers offering these systems capture higher value per vehicle than tandem master cylinder makers.

### Electric Trucks and Buses

Battery-electric buses and trucks need braking architectures that coordinate electric retarders with dual air or hydraulic circuits. Proposed heavy-vehicle AEB rules in the US [11] and GSR2 requirements in Europe [7] add electronic control demands. This creates room for specialist commercial braking suppliers to bundle valves, controllers, and software.

### Brake Health Data and Service Models

Each braking circuit's wear and pressure sensor data can be reported by connected cars. Because unplanned downtime is expensive, fleet managers appreciate early alerts of circuit leaks or valve problems. By offering fleets and leasing companies predictive maintenance subscriptions, suppliers can profit from this data and supplement one-time hardware sales with recurring income.

### Remanufacturing and Certified Aftermarket Programs

Aging commercial fleets in Latin America and Africa create steady demand for replacement master cylinders, relay valves, and brake lines. Certified remanufacturing offers a lower-cost alternative to new parts while keeping safety performance intact. Branded programs can counter counterfeit supply described in Section 5.5.

## Future Outlook

## Dual Circuit Brake System Market Future Outlook

### Automated Driving and Fallback Braking

Automated driving raises the stakes for braking redundancy. UN Regulation No. 157 on automated lane keeping requires vehicles to manage failures without immediate driver input [25]. For the Dual Circuit Brake System Market, this means two circuits backed by redundant electronic control, power supply, and sensing. Suppliers will compete on fail-operational designs rather than fail-safe ones.

### Electrification Supercycle

EVs accounted for more than 20% of global car sales in 2024 [13], and their share will keep rising through 2035. Regenerative braking handles much of the deceleration in electric cars, so friction brakes see less wear but more complex control. Integrated brake units that coordinate motor torque and hydraulic pressure across circuits will take a growing share of system value.

### Software-Defined Vehicle Platforms

OEMs are consolidating electronic control units into centralized vehicle computers. Brake control software is moving closer to these domain controllers, while hydraulic hardware remains with brake suppliers. Firms that can supply validated software, over-the-air update support, and cybersecurity compliance will gain strategic weight with OEMs.

### Brake Emissions and Sustainability

Euro 7 sets brake particle limits of 7 mg/km for most cars and 3 mg/km for battery-electric models [8]. These limits push changes in pad compounds, rotor coatings, and caliper design. Brake suppliers will also face growing customer demand for lower-carbon aluminum and recycled materials in hydraulic components.

## Segment Insights

## Dual Circuit Brake System Market Segmentation

The Dual Circuit Brake System Market is segmented by vehicle type into passenger and commercial categories, with regional coverage addressed in Section 7.

### By Vehicle Type

| Segment | Key Metric (2025) | Primary Demand Driver |
| --- | --- | --- |
| Passenger | 61.5% share | Universal fitment and EV platform upgrades |
| Commercial | 7.1% CAGR | Heavy-vehicle AEB rules and freight growth |

Passenger vehicles lead the Dual Circuit Brake System Market by share because nearly every car built worldwide uses diagonal or front/rear split hydraulic circuits. Content per car is rising as electrohydraulic units replace vacuum boosters on EVs. Commercial vehicles grow faster, as proposed US heavy-vehicle AEB rules [11] and fleet electrification reshape commercial vehicle brake architecture around dual air circuits with electronic control, raising value per truck, bus, and trailer.

## Regional Market Share Analysis

## Regional Market Share Analysis

| Region | Key Metric (2025) | Primary Investment Themes |
| --- | --- | --- |
| North America | 34.5% share | Light-truck fleet, AEB mandates, heavy-vehicle braking rules |
| Europe | USD 111.7 Million | GSR2 compliance, EV platforms, Euro 7 brake emissions |
| Asia-Pacific | 7.6% CAGR | China EV output, India NCAP, ASEAN production growth |
| Latin America | 7.0% share | Brazil truck fleet renewal, localization |
| Middle East and Africa | 6.9% CAGR | Commercial fleet growth, Gulf infrastructure programs |
| Total | USD 455.8 Million | — |

Regional demand in the Dual Circuit Brake System Market follows vehicle production, fleet size, and the strictness of local brake approval rules. North America leads on value, Asia-Pacific leads on growth, and Europe sets the benchmark for type approval.

### North America

| Country | Key Metric (2025) | Key Driver |
| --- | --- | --- |
| United States | 79.5% of regional share | FMVSS 127 AEB rule and large pickup fleet |
| Canada | USD 13.8 Million | Harmonized safety standards and heavy truck demand |
| Mexico | 7.4% CAGR | Export-oriented vehicle assembly growth |

The United States anchors regional demand through high per-vehicle content in pickups and SUVs, which use larger brake components than compact cars. FMVSS No. 135 governs light-vehicle braking [4], while FMVSS No. 121 covers dual air circuits on heavy trucks [3]. Mexico's assembly plants supply both US and Latin American markets, so supplier investment there is rising faster than in the US or Canada.

### Europe

| Country | Key Metric (2025) | Key Driver |
| --- | --- | --- |
| Germany | 24.0% of regional share | Premium OEM production and brake engineering base |
| United Kingdom | USD 15.2 Million | EV transition and commercial van demand |
| France | 13.5% of regional share | Light commercial vehicle production |
| Italy | 6.0% CAGR | Performance and commercial vehicle manufacturing |
| Spain | USD 8.9 Million | High-volume assembly for export |
| Nordic Countries | 6.4% CAGR | Heavy truck production and EV adoption |
| Russia | 5.5% of regional share | Domestic production under localization rules |
| Rest of Europe | USD 15.6 Million | Central European assembly hubs |

Europe's demand rests on the UNECE type-approval system, where UN R13 and R13-H define failure-mode braking [5][6]. GSR2 extended advanced safety requirements to all new registrations in July 2024 [7], and Euro 7 introduces the first limits on brake particle emissions [8]. Germany remains the region's engineering center, hosting the headquarters of several leading brake suppliers.

### Asia-Pacific

| Country | Key Metric (2025) | Key Driver |
| --- | --- | --- |
| China | 46.0% of regional share | World's largest vehicle and EV production base |
| India | 9.2% CAGR | Bharat NCAP and rising road safety enforcement |
| Japan | USD 22.4 Million | Domestic OEMs and hybrid platform leadership |
| South Korea | 8.5% of regional share | Export-oriented OEMs and EV growth |
| Australia and New Zealand | 5.6% CAGR | Imported vehicle fleet and ADR safety rules |
| ASEAN | 8.3% CAGR | Thailand and Indonesia assembly expansion |
| Rest of Asia-Pacific | USD 6.1 Million | Growing commercial vehicle fleets |

Asia-Pacific is the fastest-growing part of the Dual Circuit Brake System Market because it combines volume and regulatory catch-up. China's EV dominance drives demand for electrohydraulic units [13], while India's 168,491 road deaths in 2022 [14] spurred stricter vehicle norms and Bharat NCAP [15]. ASEAN production hubs in Thailand and Indonesia add steady growth for localized brake suppliers.

### Latin America

| Country | Key Metric (2025) | Key Driver |
| --- | --- | --- |
| Brazil | 54.0% of regional share | Heavy truck and bus manufacturing |
| Argentina | 6.8% CAGR | Recovering vehicle production |
| Rest of Latin America | USD 8.5 Million | Fleet renewal in Chile, Colombia and Peru |

Brazil dominates regional demand through one of the world's larger truck and bus manufacturing bases. Latin NCAP ratings have pushed OEMs to upgrade braking specifications on popular models. Argentina's growth depends on macroeconomic stability, while smaller Andean markets rely heavily on imported vehicles and aftermarket parts.

### Middle East and Africa

| Country | Key Metric (2025) | Key Driver |
| --- | --- | --- |
| Saudi Arabia | 7.8% CAGR | Vision 2030 logistics and fleet expansion |
| United Arab Emirates | USD 3.6 Million | Commercial fleet and re-export trade |
| South Africa | 24.0% of regional share | Local vehicle assembly and export base |
| Egypt | 7.3% CAGR | Expanding assembly and bus production |
| Rest of Middle East and Africa | USD 7.9 Million | Imported vehicle fleets and aftermarket demand |

South Africa holds the largest regional share through established assembly operations serving export markets. Saudi Arabia's logistics and construction programs drive heavy-vehicle demand, while Egypt is building local assembly capacity. Across much of Africa, older imported fleets make aftermarket replacement the main demand channel, though the WHO notes that road fatality rates remain highest in low-income countries [1].

## Competitive Benchmarking

## Competitive Benchmarking

The Dual Circuit Brake System Market is moderately concentrated, with an estimated HHI of about 1,100–1,300. The top five suppliers hold an estimated 50–58% of revenue, led by large Tier-1 firms with global OEM contracts. Commercial vehicle braking forms a more specialized tier, while regional suppliers in China, India, and Japan compete on cost in passenger platforms.

| Company | Est. Revenue Share Range | Key Offerings for Dual Circuit Brake System Market | Strategic Positioning |
| --- | --- | --- | --- |
| Robert Bosch GmbH | ~13–16% | Tandem master cylinders, iBooster, integrated brake units | Global leader in EV brake control [19] |
| Continental AG | ~11–14% | MK C1/MK C2 integrated brake systems, calipers | Brake-by-wire with hydraulic fallback [20] |
| ZF Friedrichshafen AG | ~10–13% | Integrated brake control, commercial braking via ZF CV systems | Broad passenger and commercial portfolio [21] |
| Aisin Corporation | ~7–9% | Master cylinders, brake actuators | Strong position with Japanese OEMs |
| Hitachi Astemo, Ltd. | ~6–8% | Electric brake boosters, hydraulic units | Honda-backed scale in Asia [24] |
| Knorr-Bremse AG | ~5–7% | Air brake systems, valves for trucks and buses | Commercial vehicle braking specialist [22] |
| HL Mando Corporation | ~4–6% | Integrated dynamic brake systems | Growing EV supplier in Korea and China |
| Brembo S.p.A. | ~3–5% | Calipers, brake-by-wire development | Premium and performance focus |
| Haldex AB (SAF-Holland) | ~2–4% | Air brake valves, trailer braking | Trailer and axle integration |
| Akebono Brake Industry Co., Ltd. | ~2–4% | Calipers, brake components | Japanese OEM and aftermarket supply |

## Recent News & Developments

## Recent News & Developments

The developments below shaped regulation and supplier structure in the Dual Circuit Brake System Market between 2023 and 2025.

- NHTSA and FMCSA (June 2023): Proposed requiring automatic emergency braking on heavy vehicles above 10,000 lb gross weight, which would raise electronic control content in dual air and hydraulic circuits [11]
- Bharat NCAP (October 2023): India's vehicle crash-rating program took effect, encouraging OEMs to upgrade braking and ESC on mass-market cars [15]
- Honda Motor Co. (October 2023): Became majority shareholder of Hitachi Astemo, consolidating a major brake supplier under OEM ownership [24]
- SAF-Holland SE (February 2024): Completed its acquisition of Haldex, combining trailer axles with air brake and valve technology
- US NHTSA (April 2024): Finalized FMVSS No. 127, requiring AEB on light vehicles by September 2029 [10]
- European Union (May 2024): Published the Euro 7 regulation, introducing the first limits on brake particle emissions [8]
- European Union (July 2024): GSR2 requirements began applying to all new vehicle registrations [7]

## Report Scope

| Parameter | Details |
| --- | --- |
| Market Scope | Covers dual-circuit hydraulic and air brake systems, including master cylinders, split-circuit valves, and integrated brake units, sold to OEMs and the aftermarket for passenger and commercial vehicles |
| Study Period | 2021–2035 |
| Base Year | 2025 |
| Historical Data | 2021–2024 |
| Forecast Period | 2026–2035 |
| Market Size in 2025 | USD 455.8 Million |
| Market Size in 2035 | USD 855.6 Million |
| CAGR (2026–2035) | 6.5% |
| Fastest Growing Segments | Commercial (7.1% CAGR); Asia-Pacific (7.6% CAGR); India (9.2% CAGR); ASEAN (8.3% CAGR) |
| Regions Covered | North America, Europe, South America, Asia Pacific, Middle East and Africa and ROW |
| Companies Profiled | Robert Bosch GmbH, Continental AG, ZF Friedrichshafen AG, Aisin Corporation, Hitachi Astemo Ltd., Knorr-Bremse AG, HL Mando Corporation, Brembo S.p.A., Haldex AB, Akebono Brake Industry Co. Ltd. |
| Valuation Currency | USD Million |
| Methodology | 350+ primary expert interviews; bottom-up market sizing; top-down validation; data triangulation; scenario-based forecasting; real-time project tracking |

## Frequently Asked Questions

**Q: How should fleet buyers evaluate brake suppliers?**
A: Buyers in the Dual Circuit Brake System Market should check UN R13 approvals and field failure data by circuit split layout. Diagonal splits suit front-drive cars, while front/rear splits fit heavier, rear-biased platforms [5].

**Q: Does brake-by-wire make the Dual Circuit Brake System Market obsolete?**
A: No. Most decoupled and electrohydraulic systems keep two hydraulic circuits as a mechanical fallback, which current approval rules effectively require [6]. Value shifts toward control units rather than disappearing.

**Q: What certification hurdles face new entrants in the Dual Circuit Brake System Market?**
A: Homologation under UN R13-H or FMVSS 135 includes partial-circuit failure testing and often takes more than a year [4][6]. Incumbents with existing approval libraries move faster on new platforms.

**Q: How do heavy-truck air brakes relate to dual circuit design?**
A: Trucks under FMVSS 121 use two air circuits with separate reservoirs instead of hydraulic lines [3]. The redundancy principle is the same, but valves and spring brakes create a distinct supplier base.

**Q: What is the main integration challenge on electric vehicles?**
A: Blending regenerative and friction braking without uneven pedal feel is the hardest task. Torque must hand off between motor and circuits within milliseconds, favoring integrated brake control modules [13].

**Q: Where is aftermarket demand strongest in the Dual Circuit Brake System Market?**
A: Replacement of master cylinders, relay valves, and brake lines in aging commercial fleets offers the steadiest demand. Fleets in Africa and Latin America often run vehicles well past 15 years.

**Q: Do agricultural vehicles follow separate braking rules?**
A: Yes. EU Regulation 167/2013 sets distinct braking requirements for tractors and trailers, including trailer braking lines [9]. This creates a niche outside the on-road passenger and commercial categories.


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