This is the Traffic Speed dataset used in the following paper:
Data Polygamy: The Many-Many Relationships among Urban Spatio-Temporal Data Sets, F. Chirigati, H. Doraiswamy, T. Damoulas, and J. Freire. In Proceedings of the 2016 ACM SIGMOD International Conference on Management of Data (SIGMOD), 2016
The dataset includes records of the average speed in the streets of Manhattan, from 2009 to 2012, and was derived from the following paper:
Exploring Traffic Dynamics in Urban Environments using Vector-Valued Functions, Jorge Poco, Harish Doraiswamy, Huy. T. Vo, João L. D. Comba, Juliana Freire, and Cláudio. T. Silva. In Proceedings of the 2015 Eurographics Conference on Visualization (EuroVis '15). Eurographics Association, Aire-la-Ville, Switzerland, Switzerland, 161-170.