Background: Approximately twenty-five years ago, RIDOT stopped using granite curbing as a. standard, with the exception of bridge projects. The primary motivation was cost, as precast. concrete, the replacement, was cheaper to purchase and install.
Longest damage path and duration: The Tri-State Tornado. The longest recorded tornado journey in U.S. history was the Tri-State Tornado of 1925, which traveled almost 220 miles across southeastern Missouri, southern Illinois, and southwestern Indiana during its 3.5-hour life. The average tornado travels about 5 miles.
Direction of movement is usually from southwest to northeast. (Note: Tornadoes associated with hurricanes may move from an easterly direction.) Length of path averages 4 mi, but may reach 300 mi. A tornado traveled 293 mi across Illinois and Indiana on May 26, 1917, and lasted seven hours and 20 minutes.