Automated WIM Enforcement Back-office Implementation

Key facts

Available rich traffic flow data

25% decrease in amount of vehicles above 52t

Enforcement processes made more efficient

System ready for direct enforcement


The Latvian State Roads performs the management of the
state road network, administration of the State Road Fund
and organisation of public procurement in order to provide
the publics with profitable, durable, safe and environmentally
friendly state road network.

The challenge

It’s a common understanding that overweight vehicles pose
risks to road infrastructure and safety.

Total weight, axle loads and spacing of the vehicle is crucial
for road structures such as bridges and others, while the axle
and axle group loads are crucial for pavements.

Almost a third of the full traffic flow on the main Latvian
roads come from the Heavy Goods Vehicles and the problem
with overweight vehicles on the national roads became

Periodically organised manual traffic controls confirmed that
the laws were not abided by a large number of carriers but
the scope of the issue was hard to estimate precisely due to
a lack of automated and efficient approach towards monitoring
the full traffic flow for overweight vehicles.

The solution

dots. was contracted to implement a Fits.back-office solution
that would integrate Kistler’s WIM sensors and Siemens
Sicore II ANPR cameras to automatically capture photographic
evidence of all of the overweight vehicles (recording
gross vehicle weight and axle loads).

The solution also provided information on the full traffic,
which enabled the client to evaluate the overweight vehicle
data in the context of the complete traffic flow. system is used to facilitate the pre-selection
process and to gather necessary evidence data. It is then
prepared for delivery to the responsible road-safety authority
for further violation processing purposes.


The outcome

Latvia could start with a modern back-office system in place that would easily support a further expansion of the WIM locations across the main highways as well as providing direct enforcement capabilities as soon as the changes in the law would permit such an enforcement method.

The current installation at one of Latvia’s most important highways (A7) provides necessary data and valuable insight into the proportions of overweight vehicles. Recent measurements have indicated that on average 44% of all vehicles are above 3.5t and 5.6% of vehicles are above 44t.

Data shows that pre-selection of the vehicles has not only made the work of law enforcement officers more efficient but also the amount of heavily overweight vehicles is steadily decreasing.

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by dots.

dots. are a technology company with a 20-year experience in complex software development, IT infrastructure, cybersecurity and R&D, striving to take a different approach in a traditional Intelligent Transportation Systems industry by using the latest advancements in Cloud and Machine Learning.

dots. is an active member of ERTICO, an Intelligent Transportation System organization in Europe that promotes research and defines ITS industry standards.