These include the return of slick tyres, major aerodynamic alterations, and energy recovery systems.

BBC: Hamilton welcomes new regulations

At the top of the list of nagging uncertainties among the rival teams is the optional introduction of kinetic energy recovery systems (Kers).

BBC: F1 teams face testing times

And by design, Recovery Act work on roads, bridges, water systems, Superfund sites, broadband networks, and clean energy projects will all be ramping up in the months ahead.

WHITEHOUSE: Job Creation and Economic Growth