California's "Hydrogen Highway" faces challenges due to limited stations and high fuel costs.

California's "Hydrogen Highway," a planned network of fueling stations, faces challenges as former chief climate regulator Mary Nichols drives a battery-electric Ford Mustang Mach-E with similar range. Despite initial investment, hydrogen vehicles are not expected to dominate the market, except for heavy-duty trucks. Few hydrogen fueling stations and high costs to fill up ($200) make life on California's "Hydrogen Highway" less appealing.