Lien-Wu Chen Pranay Sharma Yu-Chee Tseng Eco-Sign: a load-based traffic light control system for environmental protection with vehicular communications. 438-439 2011 SIGCOMM https://doi.org/10.1145/2018436.2018509 https://doi.org/10.1145/2043164.2018509 conf/sigcomm/2011 db/conf/sigcomm/sigcomm2011.html#ChenST11