About CTT

Municipal GHG emission data repositories are expensive and time-consuming to build, maintain, validate, and evaluate. The absence of detailed cost/benefit calculations and measurements make it difficult to understand results of mitigation strategies. The Carbon Track and Trace (CTT) project aims to develop an automated system for greenhouse gas (GHG) emissions monitoring and reporting. The system will enable a municipality to automatically log and analyse calibrated measurements of their direct GHG emissions. This data will for the first time allow municipalities to develop evidence-based policy for mitigation strategies, linking specific actions and strategies to measured reductions unlocking the potential for significant increases in private capital investments in GHG emission reduction measures.


An IoT Sensor Network

Realtime measuring of greenhouse gas levels can be achieved by using inexpensive, open-source hardware.



By using novel communication technologies like LoRaWAN, we make the sensor network scalable.


Cloud Integration

The measurements from the IoT sensor network are relayed from gateways to an open cloud platform, allowing for easy integration with other applications.


Data Analysis

Tailored data analysis will integrate sensor measurements with other open data sources to generate new insights and city-level emission overviews.



Analysis results are visualized to different stakeholders and also made available for further processing.

End users

Politicians and Planners

CTT gives politicians and planners more accurate real-time greenhouse gas emissions measurements, facilitating faster feedback loops between action and quantifiable impact.


Giving citizens access to real time air quality maps of their city give them the opportunity to influence their local community to become more environment friendly, choose a 'green route' to work and choose when its best to go for a run.


The CTT ecosystem gives researchers an open source, low-cost platform for field measurements of greenhouse gas emissions in buildings, energy, transport, and waste, and will lower the threshold for researchers to engage with local emissions data.


Xi Jinping and Li Keqiang stressed to develop smart city, green eco city and sponge city in the central economic work conference and central urban work conference in December 2015. After an successful first expo that took place in July 2015, the 2nd China Smart City Expo is now coming up and taking place in the Beijing Exhibition Center in Beijing.
The theme of 2nd Expo is “Internet + Innovation Entrepreneurship”. The expo contains exhibition, summit & forum, policy announcement, marching-making, and platform for dialog. The aim of expo is for displaying the development of smart city of the country, showing the ongoing project, achievements and plan, absorbing the advance experiences of overseas, exchanging the ideas between counties, prompting the advance products and research, and building a platform of communication between government, industry, research institutes, financial and the society.
CTT are excited to be attending the Expo taking place 29 - 31. July.

Post date: 2016-07-21 10:10

Dirk Ahlers, Patrick Driscoll presented at ICE ITMC Conference 2016, Session Sustainable Technology Management. A necessary prerequisite for impactful climate mitigation action is the availability of suitable and reliable baselines of emissions. This is especially true for urban and city-level actions and strategies that need reliable local data about emissions to prioritize actions and investments to achieve the highest possible impact. We describe the work of the Carbon Track and Trace project (CTT) done in collaboration with the municipality of Trondheim, Norway, to better understand the current gaps in emission reporting and monitoring based on GPC and discuss initial steps to address them.

Post date: 2016-07-04 20:27

Jette Vindum from Vejle Municipality presented the city needs and requirements for emissions monitoring, after a brief introduction to the CTT project.

Carbon Track and Trace CTT in Vejle available from SlideShare.

Post date: 2016-06-14 13:37

CTT has presented at ICLEI Smart CITIES 2.0 @ Metropolitan Solutions 2016.

Jette Vindum from Vejle Municipality has presented the city needs and requirements for emissions monitoring, after a brief introduction to the CTT project. The presentation is online.

Post date: 2016-06-14 13:34

CTT participated at the East Asia Clean Air Cities forum (EACAC) in Seoul. CTT was presented both at the forum and at a technical expert workshop.

CTT2.0 Carbon Track and Trace - Stop guessing, Start measuring available from Slideshare.

Post date: 2016-06-07 21:37

The CTT project has been invited to present at the 2016 Northeast Asia Forum on Air Quality Improvement in Seoul on 19-20 May. The forum was organized by ICLEI East Asia and Seoul Metropolitan Government (SMG) as part of the East Asia Clean Air Cities program (EACAC). Following the forum, an expert workshop was held on 20 May with partners and participating cities of the EACAC program. Dirk Ahlers presented CTT and NTNU to an international audience at the forum and also presented the CTT solution to the technical expert workshop.

ICLEI has a forum report online. The EACAC presentation is also available online: CTT2.0 Carbon Track and Trace - Stop guessing, Start measuring.

Post date: 2016-06-07 21:30

We are organising the Workshop on City Strategies for Smart Sustainable Climate Solutions, CS3CS, colocated with ICE. The purpose of this workshop is to discuss mitigation and measurement approaches that specifically address cities and city-scale strategies and solutions with a focus on fast and sustainable results. More information at the workshop website.

Post date: 2016-06-07 21:22

CTT2.0 Carbon Track and Trace presentation for SmartCitiesIndiaExpo May 2016 in Delhi and presentation to interested partners. Overview of the project, aims, approaches, technologies used to measure, report, understand greenhouse gas emissions.

CTT Smart Cities India 2016 Expo Presentation available from Slideshare.

Post date: 2016-05-26 19:34

On 23 May, Wireless Trondheim hosted a LoRa Workshop at DIGS, Trondheim, where CTT was a co-organizer. The purpose of the workshop was to introduce the participants LoRa by giving them hands-on experience with hardware. The available hardware at the workshop was: 

If you wish to read more about the workshop, you can check out both Wireless Trondheim's  blogpost,, and the associated Github Repository,

Post date: 2016-05-23 09:18

Product brief flyer made for the Smart Cities India 2016 Expo.

Post date: 2016-05-20 12:40