Rhode Island → District of Columbia · Interstate 95
On heavy-rain or dense-fog days the Providence, Rhode Island, to Washington, District of Columbia, leg routinely demands well more than the 6h 29m estimated: Interstate 95 carries known hydroplaning hot spots and reduced-visibility corridors that justify dropping to 35 mph through a few short stretches. The outbound run covers 680 km (423 miles) over varied topography between Providence (the capital of Rhode Island and one of the oldest seaports in New England) and Washington (the capital of the United States and seat of the federal government), demanding sharper attention on mountain descents and shoulder-less curves. Before pulling out, check brake-pad wear, tire tread depth, and washer-fluid level in the reservoir. Fuel spend holds near $56.86 for the 61.8 liters (16.3 gallons) consumed. Even in adverse conditions, the flat tariff of $0.43/km guarantees the standard outbound payout of $292.40 — log any incidental costs (extra toll, mandatory meal, emergency lodging) in a separate field on the Clara receipt.