  With accurate and timely traffic forecasting, the impacted traffic conditions
can be predicted in advance to guide agencies and residents to respond to
changes in traffic patterns appropriately. However, existing works on traffic
forecasting mainly relied on historical traffic patterns confining to
short-term prediction, under 1 hour, for instance. To better manage future
roadway capacity and accommodate social and human impacts, it is crucial to
propose a flexible and comprehensive framework to predict physical-aware
long-term traffic conditions for public users and transportation agencies. In
this paper, the gap of robust long-term traffic forecasting was bridged by
taking social media features into consideration. A correlation study and a
linear regression model were first implemented to evaluate the significance of
the correlation between two time-series data, traffic intensity and Twitter
data intensity. Two time-series data were then fed into our proposed
social-aware framework, Traffic-Twitter Transformer, which integrated Nature
Language representations into time-series records for long-term traffic
prediction. Experimental results in the Great Seattle Area showed that our
proposed model outperformed baseline models in all evaluation matrices. This
NLP-joined social-aware framework can become a valuable implement of
network-wide traffic prediction and management for traffic agencies.
