Associate Professor of Urban Planning Michael Manville was mentioned in a San Diego Union-Tribune article about the city’s proposed road fee, which would charge drivers a set price for every mile traveled. The road charge would help pay for San Diego’s $160-billion proposal to expand rail, bus and other transportation services throughout the region. It would also help replace the revenue from the current gas tax as fossil fuels are phased out in efforts to combat climate change. “The gas tax, regardless of how much revenue it raises, is in fact a climate tax, a carbon tax,” Manville explained. “We probably shouldn’t just throw that out the window.” A statewide pilot program is also testing the road charge strategy. Experts are debating whether to adopt a flat per-mile fee or charge more to drivers with less fuel-efficient vehicles. While the second option would be more complicated, it would incentivize drivers to adopt cleaner vehicles.