Authorities on Monday reported traffic crashes and significant road delays across the country as thousands of people flocked to prime locations to gaze up at the rare solar eclipse.

Local roads and highways in states including Texas, Ohio, Illinois, Michigan, Indiana, Vermont and New Hampshire were being impacted by the flood of drivers, many of whom were from out of state. The most intense bottlenecks appear to be in the path of totality, a vast swath of the country – approximately 115 miles wide, crossing through 13 states – where people will be able to view the total eclipse.

Traffic slowed on major highways in Indiana as the eclipse progressed Monday afternoon. State transportation officials posted video showing backups forming on Interstate 65 headed toward Indianapolis, the Indianapolis Star reported.

"Eclipse traffic is starting to pop up!"  the Indiana Department of Transportation posted in an update for west central Indiana. Indiana State Police Sgt. John Perrine posted on X that traffic on state highways was flowing but rest stops along interstates in the path of totality are at or near capacity. 

Perrine said transportation officials will shut them down "once they are full and will not allow any more traffic in for the duration of the eclipse." One rest stop along I-74 near Veedersburg, northwest of Indianapolis, was already closed because it had reached maximum capacity from "eclipse viewing traffic." 

In Oklahoma, a crash around 7:30 a.m. local time narrowed eastbound lanes on I-40, a major transcontinental highway that runs from California to North Carolina. The crash occurred not far from several state parks that were hosting eclipse events, and it's also within driving distance of the full eclipse path, which includes parts of southeastern Oklahoma and Arkansas.

"Crews estimate cleanup will take the majority of the day. Expect delays in the area and use extra caution. #trucking #eclipse," said a post on X by the Oklahoma Department of Transportation.

Multiple crashes were reported in Waco, Texas, a city in the path of totality, where several festivities and eclipse viewing events were scheduled. The crashes all occurred on I-35, which runs from southern Texas to Minnesota. The wrecks shut down multiple lanes.

"Expect major traffic delays in this area," the Texas Department of Transportation said in a statement around 9 a.m. local time.

Officials warn drivers of delays, dangers ahead of solar eclipse

In the weeks leading up to the celestial event, officials issued warnings about heavy traffic congestion and the danger of driving during the eclipse, including distracted pedestrians and the sudden change in light conditions. Eclipses have previously been tied with surges in traffic crashes, including fatal collisions.

In New York, extra troopers were staged throughout the entire state, especially in northern counties and cities, such as Buffalo, from which spectators can see a full eclipse, according to the New York State Police.

In Ohio, the state's Turnpike and Infrastructure Commission heavily staffed its toll booths, service plazas and maintenance buildings in anticipation of the eclipse, which it has designated as "a high-volume traffic event" like, for example, Thanksgiving. The Ohio Emergency Management Agency estimates, for the solar eclipse, between 150,000 and 575,000 travelers will visit the state, which encompasses areas in the path of totality.

During the 2017 eclipse, congestion in some areas lasted for up to 13 hours after totality, according to Transportation Research News, a National Research Council publication. An analysis of traffic patterns from that year suggests the worst of the traffic – on interstates and rural back roads alike – will kick off after the eclipse ends and everyone tries to leave all at once.

Contributing: Kayla Jimenez, USA TODAY; The Indianapolis Star