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mermaid.initialize({ startOnLoad: true });</script><meta content="Aron Petau" property=og:site_name><meta content="Commoning Cars - Aron Petau" property=og:title><meta content=https://aron.petau.net/project/commoning-cars/ property=og:url><meta content="How can we attack the privatization of public space through cars?" property=og:description><meta content=https://aron.petau.net/card.png property=og:image><meta content=en_US property=og:locale><body><header id=site-nav><nav><a href=#main-content tabindex=0> Skip to Main Content </a><ul><li id=home><a href=https://aron.petau.net> <i class=icon></i>Aron Petau</a><li class=divider><li><a href=https://aron.petau.net/project/>Projects</a><li><a href=https://aron.petau.net/pages/contact/>Contact</a><li><a href=https://aron.petau.net/pages/cv/>CV</a><li><a href=https://aron.petau.net/pages/about/>About</a><li id=search><button class=circle id=search-toggle title=Search><i class=icon></i></button><li id=language-switcher><details class=closable><summary class=circle title=Language><i class=icon></i></summary> <ul><li><a href=https://aron.petau.net//de/project/commoning-cars/ lang=de>Deutsch</a></ul></details><li id=theme-switcher><details class=closable><summary class=circle title=Theme><i class=icon></i></summary> <ul><li><button title="Switch to Light Theme" class=circle id=theme-light><i class=icon></i></button><li><button title="Switch to Dark Theme" class=circle id=theme-dark><i class=icon></i></button><li><button title="Use System Theme" class=circle id=theme-system><i class=icon></i></button></ul></details><li id=feed><details class=closable><summary class=circle title=Feed><i class=icon></i></summary> <ul><li><a href=https://aron.petau.net/rss.xml>RSS</a><li><a href=https://aron.petau.net/atom.xml>Atom</a></ul></details><li id=repo><a class=circle href=https://forgejo.petau.net/aron/awebsite title=Repository> <i class=icon></i> </a></ul></nav><div id=search-container><label class=visually-hidden for=search-bar>Search</label><input placeholder="Search for…" autocomplete=off disabled id=search-bar type=search><div id=search-results-container><div id=search-results></div></div></div></header><main id=main-content><article><div id=heading><p><small> <time datetime=" 2023-12-07T00:00:00+00:00">Published on December 07, 2023</time></small><h1>Commoning Cars</h1><p><small><span>By Aron Petau</span><span> • </span><span>7 minutes read</span><span> • </span></small><ul class=tags><li><a class=tag href=https://aron.petau.net/tags/accessibility-activism/>accessibility activism</a><li><a class=tag href=https://aron.petau.net/tags/ars-electronica/>ars electronica</a><li><a class=tag href=https://aron.petau.net/tags/commons/>commons</a><li><a class=tag href=https://aron.petau.net/tags/private/>private</a><li><a class=tag href=https://aron.petau.net/tags/public-spaces/>public spaces</a><li><a class=tag href=https://aron.petau.net/tags/urban-intervention/>urban intervention</a><li><a class=tag href=https://aron.petau.net/tags/university-of-the-arts-berlin/>university of the arts berlin</a><li><a class=tag href=https://aron.petau.net/tags/war-on-cars/>war on cars</a></ul></div><div id=buttons-container><a title="Go to Top" href=#top id=go-to-top><i class=icon></i></a><a href="https://shareopenly.org/share/?url=https://aron.petau.net/project/commoning-cars/&text=How%20can%20we%20attack%20the%20privatization%20of%20public%20space%20through%20cars%3F" id=share title=Share><i class=icon></i></a><a title="File an Issue" href=https://forgejo.petau.net/aron/awebsite/issues id=issue><i class=icon></i></a></div><h2 id=Commoning_cars>Commoning cars</h2><h2 id=Project_Update_2025>Project Update 2025</h2><blockquote><p><strong>System Upgrade</strong>: The monitoring system now runs on a Raspberry Pi Zero, chosen for its improved energy efficiency. The system only operates when sufficient solar power is available, making it truly self-sustainable. This update has significantly reduced the project's power consumption while maintaining all monitoring capabilities.</blockquote><h2 id=TCF_Project_Brief>TCF Project Brief</h2><p>This project was conceptualized during the 2023 Tangible Climate Futures workshop.<p>Project Lead: Aron Petau<br> Contact: <a href=mailto:aron@petau.net>aron@petau.net</a><p><a href=https://solar.petau.net/>View Live Project Data</a><h2 id=Abstract>Abstract</h2><p>Private cars represent one of the most significant privatizations of public space in modern cities.<br> What if we could transform these private spaces into public resources?<br> What if cars could contribute to public infrastructure instead of depleting it?<p>With the rise of electric vehicles and solar technology, cars can be reimagined as decentralized power stations and energy storage units. This project explores this potential by converting my personal vehicle into a public resource, equipped with:<ul><li>A public USB charging station powered by solar panels<li>A free WiFi hotspot for community use<li>Real-time monitoring of energy generation and usage</ul><p>This artistic experiment tracks the vehicle's location, energy input/output, and public usage patterns. By making this data publicly available, we can quantify the untapped potential of private vehicles and challenge conventional notions of ownership and public resources.<h2 id=Introduction>Introduction</h2><p>After seven decades of car-centric urban development, many cities find themselves at an impasse. The traditional solution of building more roads has proven unsustainable, both environmentally and socially. While one project cannot solve this systemic issue, we can experiment with alternative approaches to existing infrastructure.<p>This project proposes a different perspective: instead of viewing cars solely as transportation, what if they could serve as nodes in a public infrastructure network? By transforming private vehicles into shared resources, we might begin to address both our environmental challenges and our need for more equitable public spaces.<h2 id=Experiment>Experiment</h2><h3 id=Data_Collection_&_Analysis>Data Collection & Analysis</h3><p>A year of private vehicle usage data reveals patterns of underutilization and potential energy sharing opportunities. While the monitoring system's solar dependency means some data gaps exist, the available information clearly demonstrates the untapped potential of private vehicles as public resources.<h3 id=Technical_Implementation>Technical Implementation</h3><p>The monitoring system consists of:<ul><li>Solar-powered Raspberry Pi Zero (2025 upgrade)<li>4G-enabled Netgear M1 router<li>Solar panel array<li>Secondary car battery<li>External USB charging port<li>GPS tracking module</ul><p>The system monitors:<ul><li>Solar power generation (W)<li>Battery voltage (V)<li>GPS location<li>Energy production (Wh)<li>Energy consumption (Wh)<li>Solar potential (Wh)<li>WiFi usage statistics<li>Connected devices count</ul><h3 id=Public_Services>Public Services</h3><p>The project currently offers two main public services:<ol><li><p><strong>Free WiFi Hotspot</strong></p> <ul><li>Public access point similar to café WiFi<li>Powered by solar energy<li>Uses existing mobile data plan<li>Automatic power management</ul><li><p><strong>USB Charging Station</strong></p> <ul><li>External weatherproof USB port<li>Solar-powered with battery backup<li>Smart power management to prevent battery depletion<li>Available during daylight hours</ul></ol><h3 id=Public_Communication>Public Communication</h3><p>To make these services discoverable:<ul><li>Custom vinyl decals with clear visual indicators<li>QR code linking to real-time system status<li>Simple icons marking WiFi and USB access points<li>Project information available via web interface</ul><h2 id=Challenges_&_Considerations>Challenges & Considerations</h2><h3 id=Scale_&_Efficiency>Scale & Efficiency</h3><p>While a car's roof provides limited space for solar panels compared to buildings, this project isn't about maximizing solar generation. Instead, it focuses on utilizing existing infrastructure more effectively. Many vehicles, especially camper vans, already have solar installations. By sharing these resources, we can improve their utilization without additional environmental impact.<h3 id=Legal_Framework>Legal Framework</h3><p>Two main legal considerations shape the project:<ol><li><p><strong>Network Liability</strong></p> <ul><li>German law holds network providers responsible for user traffic<li>Investigating legal protections similar to those used by public WiFi providers<li>Implementing appropriate usage policies and disclaimers</ul><li><p><strong>Privacy & Security</strong></p> <ul><li>Balancing public access with system security<li>Protecting user privacy while maintaining service transparency<li>Ensuring responsible resource sharing</ul></ol><h3 id=Privacy_&_Data_Ethics>Privacy & Data Ethics</h3><p>The project raises important privacy considerations that we're actively addressing:<ol><li><p><strong>Data Collection</strong></p> <ul><li>Location tracking is limited to vehicle position only<li>Network usage is monitored anonymously (device count only)<li>No monitoring of user traffic or personal data<li>Regular data purging policies</ul><li><p><strong>Data Publication</strong></p> <ul><li>Aggregated statistics to protect user privacy<li>Delayed location data release<li>Focus on system performance metrics<li>Transparent data handling policies</ul></ol><h3 id=Security_Considerations>Security Considerations</h3><p>The public nature of this project introduces several security challenges:<ol><li><p><strong>Physical Security</strong></p> <ul><li>Protected charging ports to prevent tampering<li>Automatic circuit protection<li>Limited battery access to prevent depletion<li>Regular security audits</ul><li><p><strong>Network Security</strong></p> <ul><li>Isolated public WiFi network<li>Limited bandwidth per user<li>Automatic threat detection<li>Regular security updates</ul></ol><h3 id=Further_Reading>Further Reading</h3><p>For more context on the broader implications of this project:<ul><li><a href=https://sdgs.un.org/goals/goal7>UN Sustainable Development Goal 7</a> - Energy accessibility<li><a href="https://www.youtube.com/watch?v=lrfsTNNCbP0">Urban Car Impact Analysis</a> by Adam Something<li><a href=https://storymaps.arcgis.com/stories/b7437b11e42d44b5a3bf3b5d9d8211b1>Berlin Walkability Study</a><li><a href=https://www.fbi.gov/how-we-can-help-you/scams-and-safety/on-the-internet>Public Infrastructure Security</a> - FBI Guidelines<li><a href="https://www.forbes.com/sites/billroberson/2022/11/30/why-doesnt-every-electric-car-have-solar-panels/?sh=4276c42d1ac6">Solar Integration in Vehicles</a></ul><h3 id=Data_Analysis_&_System_Optimization>Data Analysis & System Optimization</h3><p>Our year-long data collection has revealed several key insights about the system's performance and potential:<ol><li><p><strong>Energy Generation Analysis</strong></p> <ul><li>Hourly solar generation data with geocoding<li>Temperature correlation tracking<li>Actual vs. potential energy generation comparison<li>Detailed usage patterns</ul><li><p><strong>System Losses</strong> We've identified two primary types of efficiency losses:</p> <ul><li>Storage limitations when batteries reach capacity<li>Environmental factors such as urban shading and suboptimal parking positions</ul><li><p><strong>Performance Optimization</strong> Current efforts focus on:</p> <ul><li>Improving energy storage efficiency<li>Optimizing parking locations based on solar exposure<li>Balancing public access with system capabilities</ul></ol><h3 id=Technical_Challenges>Technical Challenges</h3><p>Through implementation, we've addressed several key technical concerns:<ol><li><p><strong>Power Management</strong></p> <ul><li>Smart charging controls prevent battery depletion<li>Circuit protection against electrical tampering<li>Automated system monitoring and shutdown</ul><li><p><strong>User Experience</strong></p> <ul><li>Clear usage instructions via QR code<li>Real-time system status indicators<li>Automated notifications for vehicle movement</ul><li><p><strong>Data Quality</strong></p> <ul><li>Redundant data collection for intermittent connectivity<li>Local storage for offline operation<li>Automated data validation and cleaning</ul></ol><h3 id=Future_Implications>Future Implications</h3><p>This project raises important questions about urban infrastructure:<ol><li><p><strong>Scaling Potential</strong></p> <ul><li>Application to public transport fleets<li>Integration with existing urban power networks<li>Policy implications for vehicle regulations</ul><li><p><strong>Grid Integration</strong> Electric vehicles could serve as distributed energy storage, helping to:</p> <ul><li>Stabilize power grid fluctuations<li>Reduce the need for constant power plant operation<li>Support renewable energy integration</ul><li><p><strong>Social Impact</strong></p> <ul><li>Reimagining private vehicles as public resources<li>Creating new models of shared infrastructure<li>Building community resilience through distributed systems</ul></ol><p>For detailed technical specifications and implementation guidelines, please refer to our <a href=/documents/Info_Sheet_Commoning_Cars.pdf>project documentation</a>.<h3 id=The_Messy_Reality>The Messy Reality</h3><p>Let's be honest about the challenges of turning a private car into a public power station:<p><strong>The Tech Stuff</strong> Sometimes the internet drops out, the solar panels get shaded by buildings, and the whole system goes to sleep when there's not enough sun. It's a bit like having a temperamental coffee machine that only works when it feels like it. But that's part of the experiment - working with nature's rhythm instead of fighting it.<p><strong>Making it Public</strong> How do you tell people "Hey, my car is actually here to help you"? It sounds weird, right? We're so used to seeing cars as private spaces that need protection. I'm trying to flip that around with some simple signs and a QR code, but it's definitely a mental shift for everyone involved.<p><strong>Safety First (But Not Too Boring)</strong> Sure, we need to make sure nobody can drain the battery completely or short-circuit the USB ports. But we also need to keep it approachable. No one wants to read a manual just to charge their phone. It's about finding that sweet spot between "please don't break it" and "yes, this is for you to use."<p><strong>The Bigger Picture</strong> Here's the fun part: what if we could turn every parked car into a tiny power station? Instead of just taking up space, these machines could actually give something back to the city. It's a bit utopian, maybe even a bit silly, but that's what art projects are for - imagining different possibilities.<p>Think of it as a small experiment in making private things public again. 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