From the back of the book:
The year is 1986. In the 18 years since the alien outworlders first made contact with humanity, the hypercapitalist Second Industrial Revolution has brought about an unstoppable climate apocalypse.
The remaining disparate landmasses of Earth are now connected over the radioactive sea by great bridges known as Ultrahighways. These treacherous asphalt frontiers are all that separates you and your gang from bringing a mysterious alien artifact to the People’s Resistance: humanity’s last hope to resist the bootheel of the global military police and the reign of the God-King Ronald Reagan.
Navigate the Ultrahighways, evade the empy, and withstand ravaging superstorms with nothing but your gang, your cycle, and a mission: deliver the artifact at all costs.