Does anyone know/have good dataset or data feed of vehicle traffic on freeways/highways or urban area?

I'm searching for data from vehicle counters that have small interval of measurement, like 1 or 5 minutes. Data should include vehicle count, average speed, types of vehicle, average headway or gap. Also it would be great if dataset or data feed has data about incidents like car accidents or roadworks and maybe time travel data from ANPR cameras.

Also there are lot of papers that talk about vehicle traffic prediction, but they don't give dataset they used for prediction and analysis. Maybe if you have datasets like that it would be great to share it with link to paper because I would like to reproduce results and try some other methods and compare performances.