WASHINGTON, Feb 1 (Reuters) - The Biden administration will announce Wednesday it is awarding $800 million to redesign roads, improve sidewalks and make other upgrades to address the sharp increase in U. 4 million for rural Fayette County, Iowa to add rumble strips along 50 miles; Missoula, Montana will get $9 million for new bike lanes, sidewalks and bus stops. The United States has 4 million miles of roads and nearly 300 million vehicles that travel more than 3 trillion miles annually