Cestel

What Cestel does

Cestel d.o.o., headquartered in Trzin, Slovenia, is a privately-held intelligent transport systems (ITS) company founded in 1992 (with predecessor heritage from 1976) that specializes in bridge weigh-in-motion (B-WIM) technology. The company developed SiWIM, the world's first commercially available portable B-WIM system, which uses strain gauge sensors installed underneath existing bridges to weigh heavy goods vehicles without road surface equipment or road closure. SiWIM has iterated through four product generations (MkI in 2000 through MkIV in 2020) and is offered both as a managed rental service and for direct purchase, with field technicians handling end-to-end logistics from installation through reporting. The portfolio also includes SHM+ (Structural Bridge WIM Diagnostic System combining WIM with Dewesoft structural health sensors, launched 2023), BrezMobilca mobile phone usage detection, BUSko school bus stop warning signs, covert speed and noise measurement devices, static weighing services, and transport/implementation planning services.

Cestel serves primarily government infrastructure owners, municipalities, and law enforcement agencies across more than 30 countries, including long-tenured accounts such as Slovenia's DARS motorway company (since 2002), Sweden's road directorate (since 2002), Croatia (since 2007), Indonesia (since 2017), Latvia (since 2019), and Slovakia (since 2021), as well as over 30 Slovenian municipalities. The company has completed more than 5,000-5,745 measurements globally and achieved OIML R134 class 10F certification (the world's first OIML-certified bridge WIM producer), along with ISO 9001:2015, ISO/IEC 27001:2022, and BASt certifications. Revenue is generated through a mix of equipment sales, managed service contracts, professional services (static weighing, transport planning, implementation plans), authorized maintenance for HAENNI scales, and EU grant-funded R&D projects (€430,000 received in 2022-2023 for digital transformation and AI-based WIM development).

Name

Cestel

Legal name

Cestel d.o.o.

Website

https://cestel.si

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

11–50 employees

Short description

Cestel d.o.o. is a Slovenian intelligent transport systems company that developed SiWIM, the world's first commercially available portable bridge weigh-in-motion system, serving government infrastructure owners, municipalities, and law enforcement agencies across 30+ countries with B-WIM technology, structural health monitoring, and traffic safety solutions.

Ownership category

akta.pro rank

Product category

Intelligent Transport Systems / Bridge Weigh-in-Motion

NAICS

Other Measuring and Controlling Device Manufacturing (334519)

SIC

Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Weigh-in-Motion (WIM) Systems & Virtual Weigh Stations (TLAJAKAB)

akta.pro secondary industry

Incident Detection, Claims & Evidence Management (TLAEANAE)

Keywords

• Bridge weigh-in-motion systems
• Intelligent transport systems
• Overweight vehicle enforcement
• Bridge structural health monitoring
• Traffic data analysis services

Headquarters

HQ city

Trzin

HQ country

Slovenia

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. SiWIM as a Service: SiWIM system is rented as part of a service package where Cestel field technicians handle all logistics (installation, calibration, supervision, and deinstallation), and the customer receives a report. Two report types available: bridge assessment report (evaluation of remaining bridge lifespan) and traffic analysis report (traffic statistics, ESAL calculation, road damage).
2. SiWIM System Sales: Customers can purchase the SiWIM system directly rather than renting as a service. The system is fully portable and can be used for short- and long-term measurements.
3. Static Weighing Services: Static weighing of heavy vehicles performed by field teams in cooperation with police and municipal wardens, conducted throughout the country. Services include axle load control and dimension control of exceptional transports, and construction site traffic monitoring.
4. Scale Maintenance and Calibration: Authorized service for maintenance, calibration procedures, and obtaining relevant certificates from the Office of Metrology in Ljubljana for HAENNI brand axle load scales.
5. Implementation Plans (Izvedbeni načrti): Preparation of technical reports with pavement structure dimensioning descriptions, proposal of measures, and bill of quantities with cost estimates and investment assessment.
6. Transport Plans and Traffic Arrangements: Preparation of traffic plans and elaborates for exceptional transports, temporary traffic arrangements for construction and maintenance works, and obtaining permits for road closures and stakeholder approvals.

Pricing tiers

Go-to-market motion2 records

Distribution channels6 records

Marketing channels7 records

Core offering

Cestel develops, sells and operates the SiWIM bridge weigh-in-motion (B-WIM) system — the world's first commercially available, fully portable high-speed WIM platform that uses strain gauge sensors under existing bridges to weigh heavy goods vehicles without road surface equipment or traffic closures. The company also offers the SHM+ Structural Bridge WIM Diagnostic System combining WIM with structural health monitoring, the SiWIM-M and SiWIM-S web applications, and supplementary road safety products (BrezMobilca, BUSko, covert speed/noise measurement), delivered either as direct equipment sales or as a managed "SiWIM as a Service" with full field technician logistics and report delivery.

Product overview

Cestel offers a comprehensive suite of intelligent transport system (ITS) solutions centered around SiWIM - the world's first commercially available portable bridge weigh-in-motion system. The product portfolio includes the core SiWIM B-WIM system for weighing vehicles on existing bridges, SHM+ for combined bridge WIM and structural health monitoring using Dewesoft sensors, and supplementary products like BrezMobilca (mobile phone detection), BUSko (school bus warnings), and covert measurement services. SiWIM is offered both as equipment and as a service (SiWIM as a service), with web applications SiWIM-M for live monitoring and SiWIM-S for statistical analysis. Add-on modules include solar power, cameras, traffic counters, and integration with variable message signs. The company also provides static weighing services, transport planning, and implementation plan services for road infrastructure management.

Differentiator

Problem solved

Functional benefit

Brands

• SiWIM: World's first fully portable high-speed bridge weigh-in-motion system for weighing heavy vehicles while driving, used for traffic analysis, bridge assessments, and law enforcement.
• SHM+ (Structural Bridge WIM Diagnostic System)
• BrezMobilca
• BUSko

Products and services

• SiWIM Bridge Weigh-in-Motion System (MkIV) The world's first commercially available, fully portable bridge weigh-in-motion (B-WIM) system. Uses strain gauge sensors installed under existing bridges to weigh heavy goods vehicles in motion — no road surface equipment, no road closure, no driver-visible enforcement. Simultaneously collects heavy-vehicle data and bridge behaviour; supports traffic statistics, road-damage (ESAL) calculation, bridge lifespan assessment, and overweight vehicle pre-selection for enforcement. Can be purchased or rented as a managed service.
• SHM+ Structural Bridge WIM Diagnostic System Enhanced structural health monitoring system that combines advanced SHM sensors with Cestel's bridge WIM technology. Provides real-time structural monitoring, complex structural analysis (fusing WIM and SHM data), bridge maintenance planning, and overloaded vehicle monitoring in a single integrated system. Targeted at bridge engineers, road directorates and structural asset managers requiring combined traffic-load and structural-response data.
• SiWIM as a Service (Bridge Assessment Report / Traffic Analysis Report) Managed service in which Cestel field technicians perform all logistics — installation, calibration, supervision and deinstallation — of SiWIM systems. The customer receives a professionally produced report: either a Bridge Assessment Report (evaluation of remaining bridge lifespan) or a Traffic Analysis Report (vehicle classification, hourly distribution of overloaded vehicles, ESAL calculation, road damage quantification). Ideal for government infrastructure owners and municipalities preferring not to purchase equipment.
• BrezMobilca (Mobile Phone Use Detection System) Roadside system, disguised as a road bollard, that detects mobile phone usage during driving and alerts drivers not to use phones via an interactive warning sign. Designed for installation at high-risk road sections and has shown significant reduction in mobile phone usage at deployment locations. Sold to municipalities and traffic safety agencies.
• BUSko Sign System (School Bus Stop Warning Signs) Explanatory signage system for school bus stops that visually communicates with drivers and alerts them to children's presence. Available in passive form (reflective materials, yellow colour) and active form (LED flashing lights activated by children carrying special detectors). More than 60 BUSko signs have been placed throughout Slovenia. Sold to municipalities to improve child safety at school bus stops.
• Covert Speed and Noise Measurement Service Service provided using a device that visually looks like a roadside bollard so drivers do not change their behaviour. Captures real data on vehicle speed and noise for evidence-based traffic analysis. Used by municipalities and traffic safety planners to evaluate traffic-calming measures and has demonstrated average speed reductions of 10 km/h on measured road sections following interventions.
• Static Weighing, Axle Load Control and Dimension Control Services On-site static weighing of heavy vehicles performed by Cestel field teams in cooperation with Slovenian police and municipal wardens. Includes axle-load control, dimension control of exceptional transports, and construction-site traffic monitoring. More than 12,000 heavy vehicles are statically weighed per year in Slovenia. Includes authorized maintenance, calibration procedures and Office of Metrology certification for HAENNI brand axle load scales.
• Transport Plans (Prevozni načrti) for Exceptional Transports Professional preparation of transport plans and elaborates for exceptional transport operations on Slovenian roads, including temporary traffic arrangements for construction and maintenance works, route proposals, infrastructure interventions, traffic signage and equipment recommendations, and obtaining permits for road closures and stakeholder approvals.
• Implementation Plans (Izvedbeni načrti) Preparation of technical reports for road infrastructure projects, including pavement structure dimensioning descriptions, proposals for rehabilitation measures, bill of quantities with cost estimates, investment assessment and safety plans for road construction work. Delivered as a consulting deliverable to road owners and contractors.
• HAENNI Axle Load Scale Maintenance and Calibration Service Authorized service for maintenance, calibration procedures and issuing of relevant certificates from the Office of Metrology in Ljubljana for HAENNI brand axle load scales. Cestel acts as authorized representative and certified maintenance provider for HAENNI in Slovenia.

Quantifiable outcome

• A 14-ton axle causes the same damage to road surface as approximately 40,000 cars (exponential correlation between overloading and road damage per ESAL analysis)
• +6 more outcomes

Named customers12 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration7 records

AI capability3 records

Feature14 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• DewesoftcoreTechnology or IntegrationDewesoft is a technology partner providing key sensors for the SHM+ Structural Bridge WIM Diagnostic System. Specifically, Dewesoft's IOLITEiw-3xMEMS-ACC 3-axial, low-noise accelerometer is integrated into the SHM+ system for measuring structural accelerations in X, Y, and Z, static inclinations, and displacements. The partnership combines SHM sensor technology with Cestel's bridge WIM technology.
• Victoria Department of Transport and Planning, AustraliacoreStrategic or Co-development PartnerCollaboration on a pilot project deploying an advanced B-WIM solution for real-time bridge load measurement in Australia. The project provided detailed insights into how infrastructure is used day-to-day and demonstrated the value of data-driven decision-making in managing transport networks more efficiently and sustainably.
• Zavod za gradbeništvo Slovenije (ZAG) - Slovenian National Building and Civil Engineering InstitutecoreStrategic or Co-development PartnerCollaborative partner in the development of SiWIM system (since 1999). The institute has been a key research partner in bridge weigh-in-motion technology development.
• AMZSminorStrategic or Co-development PartnerCollaboration on braking distance project to demonstrate how braking distance extends when vehicles exceed permitted mass. AMZS participated in practical testing, with results published on the government portal gov.si.
• MAN Truck & Bus SlovenijaminorStrategic or Co-development PartnerPartner in braking distance project, providing trucks for testing how vehicle weight affects braking performance. Results demonstrated that overloaded trucks can have braking distances more than 10 meters longer than legally loaded trucks.
• Institut 'Jozef Stefan'minorStrategic or Co-development PartnerResearch institution partner collaborating with Cestel on research and development activities.
• Fakulteta za strojništvo (Faculty of Mechanical Engineering)minorStrategic or Co-development PartnerAcademic partner collaborating with Cestel on research and development projects.
• Direkcija Republike Slovenije za infrastrukturocoreStrategic or Co-development PartnerRepublic of Slovenia Directorate for Infrastructure - key government customer and long-term partner for road infrastructure monitoring projects.
• Družba za avtoceste v Republiki Sloveniji (DARS)coreStrategic or Co-development PartnerSlovenian Motorway Company - key long-term customer deploying SiWIM across the entire Slovenian motorway network and national roads since 2002.

Scale indicators12 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Sterela: French company developing traffic and environmental measurement equipment, including WIM and traffic data solutions. Comparable niche player to Cestel targeting road infrastructure customers in Europe.
• ECM (Electronic Control Measurement): French supplier of WIM and traffic enforcement systems, including high-speed WIM sensors and weight enforcement solutions for road authorities. Directly comparable to Cestel's SiWIM for preselection and enforcement of overloaded vehicles.
• International Road Dynamics (IRD): Canadian-headquartered global supplier of WIM systems, traffic data collection, and intelligent transportation solutions, including bridge and road WIM products. Directly comparable to Cestel in selling WIM hardware and services to government road authorities.
• WDM Limited: UK-based consultancy and systems provider specializing in WIM, traffic data collection, and pavement engineering. Closely comparable to Cestel in B-WIM services, traffic analysis reports, and road authority customer base.
• Diamond Traffic Products: US-based manufacturer of WIM products, including portable and permanent WIM systems used by state DOTs and road authorities. Comparable to Cestel in portable WIM hardware for government and infrastructure customers.
• PAT Traffic: UK manufacturer and supplier of WIM and traffic data systems for highways and bridge monitoring. Directly comparable to Cestel in providing portable WIM hardware and consulting services to road authorities.
• ASFT: Swedish traffic measurement specialist providing WIM and traffic data services to Nordic and European road authorities. Comparable to Cestel in B-WIM service offerings and Scandinavian customer base.

Others

• HAENNI: Swiss manufacturer of axle load scales and static weighing equipment. Cestel is HAENNI's authorized service and calibration partner in Slovenia; an ecosystem participant rather than direct WIM competitor.

Broad incumbents

• Mettler-Toledo: Global industrial weighing and precision instruments company with a vehicle WIM product line. Competes with Cestel's SiWIM and static weighing services from a much larger and broader product portfolio spanning lab, industrial, and transportation weighing.
• Kistler Group: Swiss global leader in piezoelectric sensors and WIM technology (e.g., Lineas WIM sensors). Operates across a much broader industrial measurement portfolio, but its WIM line directly competes with SiWIM in government and toll-road deployments.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCITgFmnm6_SznoGXGY5mZNA
• Facebookfacebook.com/cestel.siwim
• LinkedInlinkedin.com/company/cestel-d-o-o-

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Cestel