Project Nimbus is exposing datasets base on the Open Data Protocol (OData) such that any (or most) devices that can connect to the Internet would be able to consume it’s services.
Quote from OData Official Site
The Open Data Protocol (OData) is a Web protocol for querying and updating data that provides a way to unlock your data and free it from silos that exist in applications today. OData does this by applying and building upon Web technologies such as HTTP, Atom Publishing Protocol (AtomPub) and JSON to provide access to information from a variety of applications, services, and stores. The protocol emerged from experiences implementing AtomPub clients and servers in a variety of products over the past several years. OData is being used to expose and access information from a variety of sources including, but not limited to, relational databases, file systems, content management systems and traditional Web sites.
The datasets are typically have the following endpoint : http://api.projectnimbus.org/[ProviderName]odataservice.svc/[DatasetName]Set
To find out more, read the explaination of endpoint addresses
Authentication is necessary to consume our services.
If you do not authenticate, you would just get an “unauthorized access” error page.
You might want to check out OData Documentation on how to implement more advanced features such as filtering and sorting functions just by adding parameters to the endpoint address.
Example : http://api.projectnimbus.org/[ProviderName]odataservice.svc/[DatasetName]Set?$filter=’name eq john’ is identical to the SQL statement select * from datasetname from providernamedb where name = ‘john’
To find out the schema of how the dataset is formatted, you can goto the URL http://api.projectnimbus.org/[ProviderName]odataservice.svc/$metadata.
There are advantages over the OData format. In addition to compatibility across platforms and operating systems, there are actually pre-written helper codes such as Proxy Classes available to help you speed up development.
Writeup on .NET Proxy class
Writeup on Java’s Proxy Class via Restlet Framework
For other languages, refer to http://www.odata.org/developers/odata-sdk for updates.

Sorry, just a short question.
Will i be able to extract the past incidences data? For example, i want to extract out last week datas of the traffic incidents. Would i be able to do that? Thanks.