SOUTH DAKOTA INTERSTATE INFORMATION

• South Dakota News Release: "South Dakota's Interstate System turns 50 years old, remains critical link in state's transportation system, saving each South Dakota resident more than $1,800 annually in safety benefits, saved time, reduced fuel and lower consumer costs" (June 29, 2006)

• The Interstate Highway System in South Dakota: Saving Lives, Time and Money - A report on the condition, impact, use and future needs of South Dakota's Interstate Highway System (June 2006)