When most purchasers select solar road studs, they tend to prioritize several intuitive marketing parameters, mainly focusing on LED brightness, battery lifespan, and IP68 waterproof and dustproof ratings. These parameters directly affect the visual effect and basic lifespan of the road studs and are the conventional reference indicators for the general public.
However, from actual road engineering implementation cases, the core reasons for the failure of the road studs and project rework are often not due to insufficient brightness or insufficient battery life, but rather various faults caused by non-compliance with the load capacity standards.
Common engineering failure issues include: cracking of the road stud casing under pressure, damage to the internal PCB circuit board due to compression, loosening of the road stud installation with the road surface, and overall failure and detachment due to long-term vehicle rolling fatigue.
This also confirms a core engineering logic: Load Capacity is an engineering parameter rather than a marketing specification. It is the key to ensuring the long-term stable operation of solar road studs.
Many purchasing personnel have misconceptions about the load capacity of the road studs, simply understanding it as the "static bearing tonnage". However, the load conditions in road scenarios are far more complex than static pressure application. The true load capacity of solar road studs is a comprehensive manifestation of four load performance factors and is not a single numerical value. The complete Load Capacity of solar road studs includes four core dimensions:
The vertical pressure continuously applied to the road stud surface when the vehicle is stationary.
The rolling continuous pressure generated during vehicle driving and rolling.
The instantaneous high-pressure impact force generated when the vehicle passes quickly and the tires land with a jolt.
The cumulative loss load formed by long-term high-frequency vehicle rolling and repeated pressure application.
In real road conditions, the load pressure is much greater than what the public perceives. It is not that a 40-ton truck will only generate 40 tons of pressure. The core reason is that the contact area between the tire and the road stud is extremely small.
The small contact area causes the vehicle weight to be highly concentrated, resulting in a local high-pressure impact several times greater than the vehicle's own weight. This is also the core reason why many solar road studs with high static bearing capacity still fail quickly in road use.
The required load level for solar road studs cannot be randomly selected based on experience, but is derived through layer-by-layer deduction from the four core working conditions. This logic is in line with real road engineering scenarios, precisely matching the load requirements of different road sections, and avoiding selection errors.
The vehicle's self-weight is the primary source of load. Small private cars have a light self-weight and exert minimal pressure; while heavy vehicles such as trucks, trailers, and engineering heavy-duty trucks have a large self-weight base, when they are driven, the base load and impact load generated during the driving process will significantly increase, thus requiring higher performance of the solar road stud.
The higher the vehicle speed, the stronger the instantaneous impact force when the tires come into contact with the road studs. Vehicles traveling at high speeds will shorten the pressure application time and amplify the instantaneous pressure, while vehicles traveling at low speeds have a more gradual pressure and lower impact loss. The anti-impact load capacity of solar road studs required on high-speed sections is much higher than that on low-speed sections.
On the same road, the proportion of heavy vehicles passing through directly determines the rate of wear and tear of the road studs. On sections where only private cars pass, the load pressure on the road studs is extremely low; in freight lanes, port roads, and industrial park roads, the proportion of heavy trucks is very high. Long-term and frequent heavy pressure will accelerate the fatigue and aging of the road studs, and higher fatigue load levels are required.
The average daily traffic volume on the road determines the number of times the solar road studs are subjected to pressure. Frequent traffic sections cause the road studs to remain in a state of repeated pressure for a long time, resulting in faster cumulative fatigue wear; in low-frequency traffic sections, the road studs have sufficient stress recovery time and have lower requirements for bearing redundancy.
Vehicle weight → Driving speed → Heavy vehicle proportion → Traffic frequency. By combining these four factors, a precise load rating for the road section is calculated (Required Load Rating), achieving scientific selection.
Different traffic environments place different stress on solar road studs. The following recommendations are based on vehicle weight, traffic frequency, heavy truck ratio, and vehicle speed.
|
Traffic Scenario |
Heavy Vehicle Ratio |
Traffic Speed |
Recommended Load Rating |
|
Bike Lane |
Very Low |
Low |
10–15T |
|
Walkway |
None |
Low |
10–15T |
|
Parking Lot |
Low |
Low |
15T |
|
Residential Road |
Low |
Low |
15–20T |
|
Urban Road |
Medium |
Medium |
20–30T |
|
Industrial Park |
Medium |
Medium |
30T |
|
Highway |
High |
High |
30–40T |
|
Freight Corridor |
Very High |
High |
40–60T |
|
Port |
Extremely High |
Low |
60T+ |
|
Airport Service Road |
Extremely High |
Medium |
60–80T |
There is an inherent misconception in the majority of solar road stud purchases: the higher the load-bearing capacity, the better the cost-effectiveness and practicality of the road stud. Therefore, people blindly pursue higher tonnage parameters. However, in engineering selection, the appropriate load-bearing grade is the optimal choice. High tonnage is not an absolute advantage.
Solar road studs with higher load-bearing tonnage will inevitably have four hard attributes upgraded: the shell thickness is larger, the product weight is heavier, the production cost is higher (the price also rises simultaneously), and the installation and construction standards are more stringent.
If 60T ultra-high load-bearing solar road studs are used in low-load scenarios such as parking lots, residential area roads, and sidewalks, it is a typical case of Over Specification.
In scenarios with low loads such as these, there are no heavy vehicles, no high-speed impacts, and the traffic pressure is extremely small. Solar road studs within 20T can meet the lifelong usage requirements. Choosing a high-tonnage product will only significantly increase the project budget, causing unnecessary cost waste, and the heavy high-load solar road studs are more difficult to install, thereby increasing the construction cost and failure rate.
The final load-bearing grade of solar road studs is jointly determined by four dimensions: material, structure, installation, and testing. None of them can be missing. A single parameter being excellent cannot guarantee the overall load-bearing performance meets the standard.
The outer shell of the solar road studs serves as the core load-bearing component. The material directly determines the upper limit of the foundation's load-bearing capacity. The suitability of different materials varies significantly depending on the application scenarios:
PC material: Good toughness, resistant to impact, low cost, capable of supporting 10–20T, suitable for pedestrian paths, non-motorized vehicles, and ordinary municipal roads
ABS material: Lightweight, corrosion-resistant, medium-level load-bearing performance, suitable for low-load, low-frequency traffic scenarios
Aluminum alloy: High hardness, resistant to crushing, fatigue-resistant, capable of supporting 30–60T, suitable for highways, industrial parks, and freight roads
Steel: Ultra-high hardness, capable of supporting over 60T, suitable for extreme heavy-load scenarios such as ports and airports
High-quality structures can significantly increase material utilization and enhance impact resistance and fatigue resistance:
Solid Body structure: Fully bearing the pressure, without any hollow dead corners, with extremely strong pressure resistance stability
Honeycomb structure: Lightweight while distributing pressure, balancing toughness and hardness
Epoxy Filling: Filling internal voids, protecting PCB components and preventing damage from pressure
Integrated Die Casting: No joint gaps, uniform force distribution throughout, eliminating local cracking
The installation process of solar energy road studs directly affects the actual bearing capacity of the road studs when they are placed on the ground. Even the best products can fail if the installation is improper:
Epoxy bonding: It fits closely with the road surface, disperses pressure, and is suitable for most conventional roads
Bolt fixation: It is firmly fixed, resistant to displacement, and suitable for high-frequency traffic sections
Embedded installation: It integrates with the road surface, has the best pressure and impact resistance, and is suitable for heavy-load and high-speed sections
Regular solar road studs need to pass a triple load test to ensure that the theoretical parameters are compatible with the actual working conditions:
Static Test: Static pressure test to detect the structural stability under constant pressure
Dynamic Test: Dynamic rolling test to simulate the pressure condition of vehicle movement
Fatigue Test: Fatigue test to simulate long-term repeated rolling and detect the long-term service life
|
Material |
Typical Load Rating |
Suitable Roads |
|
PC |
10–20T |
Walkways, Bike Lanes |
|
ABS |
10–20T |
Parking Lots |
|
Aluminum Alloy |
30–60T |
Highways, Industrial Roads |
|
Steel |
60–80T |
Airports, Ports |
To avoid problems such as blind selection, excessive selection, and insufficient selection, a standardized engineering selection process has been compiled, with progressive steps and precise locking of the appropriate road stud load rating that is compatible with all road scenarios.
Road Type → Traffic Volume → Heavy Vehicle Ratio → Vehicle Speed → Road Surface → Choose Load Rating
Specific logic for solar road stud selection: First, determine the basic attributes of the road, distinguish between municipal roads, highways, ports, pedestrian paths, etc.; then, determine the traffic load based on the average daily traffic volume; rely on the heavy vehicle ratio to determine the core load pressure; combine the vehicle speed to assess the impact load intensity; finally, match the road surface smoothness, hardness, etc., and ultimately select the precise load-bearing tonnage of the solar road studs.
No. The traffic on ordinary expressways is heavy, the vehicle speed is fast, and the proportion of heavy vehicles is high. The instantaneous impact load far exceeds the 20T bearing limit. For regular expressway sections, it is recommended to use 30-40T bearing road studs. 20T is only suitable for urban ordinary municipal roads and residential area roads and cannot meet the long-term usage requirements of expressways.
The 15T load-bearing solar road studs are the best choice for parking lots. The parking lots mainly consist of small vehicles with extremely low speeds and without frequent impact loads. The 15T road studs can fully meet the usage requirements.
No. IP68 is a waterproof and dustproof rating, merely indicating the sealing protection performance of the solar road stud, and has no direct correlation with the compressive bearing capacity. A high waterproof rating does not imply high compressive strength. Some IP68 plastic road studs have a bearing capacity of only 10–15T. When selecting, it is necessary to distinguish between these two independent parameters.
The bearing capacity of aluminum alloy road studs is much higher than that of plastic (PC/ABS) road studs. The mainstream bearing range of plastic road studs is 10–20T, suitable for light-load scenarios; the bearing capacity of one-piece die-cast aluminum road studs can reach 30–60T, and the high-strength steel version can reach 60–80T, suitable for various heavy-load, high-speed, and high-frequency traffic scenarios.
Yes, but it must match the corresponding load-bearing grade. Light-duty track road studs weighing less than 20T cannot withstand the pressure from heavy trucks and are prone to cracking and failure; aluminum alloy and steel heavy-duty track road studs weighing 30T or more, after undergoing dynamic impact and fatigue tests, can withstand the repeated pressure from heavy trucks for a long time, operate stably without damage.
Yes. The airport service roads accommodate special vehicles and large equipment. The vehicles have extremely heavy self-weight, which falls under an extremely heavy-load scenario. Regular road studs are not suitable for this situation. Therefore, 60-80T ultra-high-capacity special solar-powered road studs must be selected. At the same time, they must meet the requirements of high fatigue resistance and high stability.
Absolutely yes. The appropriate installation method can maximize the performance of the solar road studs, while the opposite would significantly reduce the actual bearing capacity. On heavy-load sections, using embedded installation and epoxy reinforcement can increase the actual anti-pressure stability by over 30%; simple bonding and loose installation make even high-tonnage solar road studs prone to falling off and getting damaged.
No. Choosing the highest load-bearing grade blindly constitutes excessive engineering design, which will significantly increase procurement and construction costs. Using high-tonnage solar road stud road studs in low-load scenarios offers no performance gains and merely leads to budget waste. The scientific selection principle is: to match the road section conditions, select the minimum compatible load-bearing grade, and achieve the optimal balance between performance and cost.
