sentences:  The 91 Express Lanes is a four-lane, 18-mile toll road built in the median of the Riverside Freeway (State Route 91) between Interstate 15 (I-15) and California State Route 55 (SR 55).A connecting ramp from SR 91 eastbound to I-15 southbound, as well as the parallel I-15 northbound to SR 91 westbound connecting ramp, opened March 20, 2017.When the 91 Express Lanes opened in 1995 between SR 55 and Green River Road, the facility boasted several firsts — the first privately financed toll road in the U.S. in more than 50 years, the world's first fully automated toll facility, and the first application of value pricing in America.