Understanding Axle Load & GVW Limits: Sri Lanka

 

If you are a fan of heavy-duty haulers like Scania, Volvo, or DAF, or if you are in the logistics industry, understanding weight limits is crucial! Here is a breakdown of the Motor Traffic Act regulations in Sri Lanka compared to European Standards.

🇱🇰 Sri Lanka Road Rules (RDA & Motor Traffic Act)

In Sri Lanka, the maximum weight allowed on an axle depends on the number of wheels and the spacing between axles.

1. Axle Load Limits:

• Single Axle (2 Wheels): Max 6 Tons (Typically the front steer axle).

• Single Axle (4 Wheels): Max 10 Tons (Typically the rear drive axle).

• Tandem Axle (8 Wheels): Max 18 Tons (With spacing between 1.0m - 1.4m).

• Tri-Axle (12 Wheels): Max 24 Tons.

2. Gross Vehicle Weight (GVW) for Articulated Vehicles:

Vehicle Configuration	No. of Axles	Max GVW (Tons)
Prime Mover + Trailer (2+1)	3	26
Prime Mover + Trailer (2+2)	4	34
Prime Mover + Trailer (3+2)	5	42
Prime Mover + Trailer (3+3)	6	45

🇪🇺 European Union (EU) Standards

European limits are governed by EU directives and can be slightly higher due to different road infrastructure and advanced suspension systems.

1. Axle Weight:

• Non-Driving Axle: Max 10 Tons.

• Driving Axle: Max 11.5 Tons (To minimize road damage).

2. Tandem & Tri-Axle Limits:

• Tandem (Spacing 1.3m - 1.8m): 18 Tons (Up to 19 Tons with air suspension).

• Tri-Axle (Spacing 1.3m - 1.4m): 24 Tons.

3. Gross Vehicle Weight (GVW):

• 4-Axle Vehicles: Max 32 Tons.

• 5/6-Axle Articulated Vehicles: Max 40 Tons.

• ISO Container Transport: Up to 44 Tons (for 3-axle prime movers).

🌍 Fun Fact: In Scandinavian countries like Sweden and Finland, special configurations are allowed to carry between 60–76 Tons!

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🚦 Important Reminder

Road weight limits are strictly enforced on Expressways and Grade A/B roads. Always check the latest Gazette notifications from the Road Development Authority (RDA) or Traffic Police to stay compliant.

Which do you prefer? The 10-wheelers or the massive 22-wheelers? Let us know in the comments! 👇

WHAT WILL HAPPEN IN TRUCK INDUSTRY 2027

 

2027 is set to be a year of massive transformation for the Prime Mover world! For our Heavy Vehicle and Prime Mover community in Sri Lanka, there is a lot to discuss regarding these upcoming changes.

Here are some of the key details and rumors that have already leaked or surfaced unofficially:

Key Changes and Leaked Info in the 2027 Prime Mover Market

• The Euro 7 Standard Revolution: Starting in 2027, the Euro 7 Emission Standard will become mandatory in Europe. Because of this, brands like Scania, DAF, MAN, and Renault are completely redesigning their engines. Most notably, these regulations won't just target exhaust fumes; for the first time in history, dust particles from brake and tire wear will also be regulated. Consequently, we can expect to see innovative Retarder and braking technologies in the 2027 truck line-ups.

• The 2027 Volvo VNL Series: Details and photos of the 2027 Volvo VNL860 and other models in that series have already leaked (some dealers in the US market have already received information). These cabins feature the new D13 engine, an improved I-Shift Transmission, and major aerodynamic changes focused on fuel efficiency. Additionally, details regarding the 2027 Kenworth W990 and T880 models have also started to leak.

• The Future of Scania V8 and New Concepts: One of the biggest rumors circulating right now is that Scania is secretly testing its 16-liter V8 engine line to meet Euro 7 standards. Many are eagerly waiting to see how horsepower and torque figures will change under the new emission laws. Meanwhile, an extreme motorhome/overland truck concept called the "2027 Scania 6x6 Desert Titan" has been going viral online.

• DAF and New Axle Weight Regulations: To comply with new international axle weight regulations, DAF and MAN are expected to unveil new chassis designs in 2027 that reduce the truck's tare weight while increasing cabin space. Specifically, the aerodynamic cabin designs of the DAF XF, XG, and XG+ models are likely to be further evolved.

Looking at these developments, 2027 marks a brand-new era for both engine power and vehicle technology!

WHAT IS THIS DPR SYSTEM ?

 

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1. What is the DPR System?

In a diesel prime mover, the DPR system captures soot produced during combustion. It consists of a ceramic honeycomb filter that traps these particles before they exit the tailpipe. If left unmanaged, the soot would eventually clog the filter, leading to engine "derate" (power loss) or permanent damage.

How it differs from DPF

While the terms are often used interchangeably, DPR specifically refers to Hino’s "Reduction" system, which often combines a Diesel Oxidation Catalyst (DOC) and the filter into one unit to more efficiently manage exhaust temperatures and chemical reactions.

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2. The 3 Stages of Regeneration

Regeneration is the process of burning off the trapped soot by raising exhaust temperatures to approximately 500°C–600°C, converting the soot into a tiny amount of ash.

I. Automatic (Passive/Active) Regeneration

This happens while you are driving.

• Passive: Occurs naturally when the engine is under high load (e.g., highway driving), and exhaust heat is high enough to burn soot without extra fuel.

• Active: If the soot level reaches a certain threshold (usually around 40-50%), the engine computer (ECU) automatically injects a small amount of extra fuel into the exhaust stroke to artificially boost the temperature. No driver action is needed.

II. Manual (Parked) Regeneration

If the truck is driven mostly in "stop-and-go" traffic, the exhaust never gets hot enough for automatic cleaning. A DPR warning light will begin to flash on your dashboard, signaling that you must perform a manual burn.

III. Forced Regeneration

If the manual regeneration is ignored and the soot level reaches a critical point (often indicated by a "Check Engine" light or a "Limp Mode" warning), the system locks the driver out. At this stage, a diagnostic scan tool (like Hino DX2/DX3) is required to force the system to clean itself.

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3. Steps for Manual (Parked) Regeneration

When the DPR light flashes, follow these steps immediately to avoid a trip to the workshop:

1. Find a Safe Location: Park the vehicle in an open area. The exhaust will become extremely hot. Ensure there are no flammable materials (dry grass, paper, fuel) near or under the exhaust pipe.

2. Set the Vehicle:

   • Bring the engine to an idle.

   • Engage the Parking Brake.

   • Place the transmission in Neutral.

3. Check Prerequisites:

   • Ensure the engine is at operating temperature (the needle should be in the middle of the gauge).

   • Turn off the Air Conditioning and any Power Take-Off (PTO) switches.

4. Initiate the Burn: Press and hold the DPR/DPF Switch on the dashboard (usually for 2–3 seconds).

5. Monitor the Process:

   • The engine RPM will automatically rise (often to 1,200–1,500 RPM).

   • The DPR light will turn from flashing to solid.

   • Do not touch the pedals or move the gear lever, as this will cancel the process.

6. Completion: The process usually takes 15 to 30 minutes. Once finished, the engine will return to its normal idle speed, and the dashboard light will turn off.

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Pro Tip: If your DPR light is flashing, try to complete the regeneration as soon as possible. If the soot level reaches "Level 4" or "Level 5," the filter may become so clogged that it requires a manual "bake" in an oven or a complete (and very expensive) replacement.