merge into the freeway's right lane, while also moving the carriageways of I-94 closer together. On August 16, 1987, Northwest Airlines Flight 255 crashed after attempting to take off from Detroit Metropolitan Airport, killing all but one passenger upon exploding at the I-94 overpass over Middlebelt Road; that overpass was not damaged in the crash. The freeway was closed until August 18, and a memorial was later installed near the interchange between I-94 and Middlebelt Road. The completion of I-69 in the 1980s, and the approval of the North American Free Trade Agreement, increased traffic at the Blue Water Bridge. A new toll and customs plaza was built in 1991, and, later the next year, an international task force determined that traffic on the existing structure was exceeding capacity. Environmental planning started in 1993, and construction started on the second span between Port Huron and Point Edward, Ontario in 1995. In July 1997, the second span opened. The original span was closed for rehabilitation, and both were opened to traffic in 1999. The interchange with US 24 (Telegraph Road) following its mid-1960s redesign had only two bridges, and left-hand exits were used throughout. This interchange was reconfigured in 2005 to a SPUI design that was completed in December of that year. A pair of bridges called the Gateway Arch Bridges (alternately "Gateway to Detroit") was incorporated in the new interchange. In 2011, construction was started to widen I-94/I-69 approaching the Blue Water Bridge and to allow for dedicated local traffic and bridge traffic lanes. The lane configuration changes confused drivers in the area, especially motorists with outdated GPS devices; because of this, MDOT installed updated signs complete with American and Canadian flags to help prevent drivers from heading to Canada by mistake. Additional construction in the Port Huron area started in late 2013 to rebuild and reconfigure the I-94/I-69 interchange outside the city. The project improved of freeway, replaced several bridges and ramps and cost $76 million (equivalent to $ in ). In June 2014, MDOT closed the ramps from I-69 eastbound to BL I-69 through the interchange until later in the year. The project was completed in September 2015. In 2016, the sections of I-94 from the Indiana state line to the M-63 interchange was designated as part of the West Michigan Pike Pure Michigan Byway. The West Michigan Pike originated in efforts in the 1910s to improve a