LaHood: New auto mileage rules were a hard slog

Transportation Secretary Ray LaHood said Thursday that finalizing new auto efficiency rules took lots of work for his department.

The Transportation Department and EPA rolled out final rules Thursday – covering model years 2012-2016 – that sharply increase fuel economy standards and impose first-time carbon dioxide limits on vehicles.

Asked on a conference call if DoT and EPA would continue collaborating on rules for subsequent years, he joked: “Anything post-2016 will come after people get a good week of sleep.”