The Citopia Maas/Multimodal project is currently in progress for completion by January 2023. The project team has been working with an advisory panel as part of the Transit IDEA award program to refine the project plan and deliverables. 

In addition to completing the schemas required for the demo, the team has defined MaaS/multimodal user journeys, user stories, and sequence diagrams. The team is currently working on the demo user interface designs for the Citopia MaaS/Multimodal mobile app and collecting data for demo simulation from various transit agencies. 

Meanwhile, the development team has started working on the product backlog. Stay tuned for more to come in 2022!

Motivation Behind the Pilot

According to the UN, 55% of the world’s population lived in urban areas in 2018 and is projected to increase to 70% by 2050. With increasing populations, cities around the world are looking for solutions to manage existing infrastructure demands. In addition, the way people like to move around is also evolving. They want a seamless, efficient, integrated multimodal transit experience. While centralized platforms claim to offer the solution, they lack the interoperability needed to scale. At the same time, integration costs are high for providers, and retaining users’ and providers’ data privacy, along with fair business practices, is simply not possible. 

To this end, MOBI created Citopia, a decentralized platform and tokenized ecosystem where mobility stakeholders can securely meet, message, and transact. Citopia allows for the onboarding of decentralized identities of users and providers, along with vehicles, devices, services, infrastructure, and data sets to create the seamless, secure, and private mobility experience that all stakeholders demand. (See the Appendix below for more information on decentralized identities.)  

The Citopia Mobility as a Service (MaaS)/Multimodal proposal was awarded a seed grant by the Transit IDEA Program in October 2021. The Transit IDEA Program is a part of the Transit Cooperative Research Program (TCRP), which is sponsored by the Federal Transit Administration (FTA).

What the Pilot Demonstrates

This project will demonstrate complete multimodal trips with seamless itinerary, ticketing, and payment on Citopia MaaS decentralized platform with mobiNET as the trust anchor for identity management. Citopia uses blockchain, decentralized identifiers (DIDs), and Zero Knowledge Proof technology to ensure that the sovereign identities (anchored in mobiNET) of travelers, transit agencies, vehicles, and mobility service providers are compatible, can communicate, and can transact while preserving data privacy. In contrast with many centralized platforms, which collect user data, Citopia MaaS users’ personally (or organizationally) identifiable information is always stored locally on the users’ device or server. 

The demonstration will involve developing the Citopia Multimodal dApp, integrating the Citopia platform and mobiNET core services to enable Decentralized Identities, coordinating communication of trip data between modal service providers, and creating verifiable MOBI Trusted Trip (MTT) records that enable seamless multimodal transit. The demonstration will use simulated data, along with sovereign identities linked with timestamped locations to enable verifiable credentials of MTT.  

Following a successful demonstration, participants will evaluate results of user acceptance testing and iterate to improve the platform. The ultimate goal is to identify areas for future research and prime the Citopia MaaS/Multimodal dApp for real-world implementation. (An example of a multimodal daily commute using Citopia is depicted below.) 

Appendix: Decentralized Identity Solutions

Decentralized Identity and/or Self Sovereign Identity (SSI) is a new cryptographic technology that enables entities to assert ownership of their identity, where the identity remains private and not disclosed during transactions in decentralized ecosystems. 

Decentralized Identifiers (DIDs) are identifiable endpoints belonging to a SSI, and can be shared with the world. This includes documents, wallets, smart contracts, or programmable agents.

In a decentralized system, DIDs are embedded in Verifiable Credentials (VCs). VCs may be created by trusted entities, such as government agencies, businesses, universities, or employers, and issued to a “holder” of the VC. If we think of the DID as a global ID, then VCs are like digital passports, or unique stamps which serve to attest to specific information about an entity associated with a specific DID.

A Digital Twin is a digital representation of a real-world entity or system. The implementation of a digital twin is an encapsulated software object or model that mirrors a unique physical object, process, organization, person, or other abstraction. SSI and DIDs are needed for digital twins to be trusted in decentralized ecosystems.

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