A truck left Interstate 294 near Lake Cook Road in Deerfield Wednesday morning and ended up submerged in a pond just off the highway, setting off a rescue that pulled a man, a woman, and their dog from the water. One person was taken to a local hospital for treatment, while the fate of the vehicle's occupants otherwise remained unclear as investigators worked to determine what sent the truck off the roadway.
Illinois State Police troopers responded to the scene Wednesday morning after the truck went off the tollway and into the pond, according to CBS News Chicago. Emergency crews managed to free all three occupants from the vehicle in the water, and one of the two people rescued was transported for medical care, the station reported. The cause of the crash remains under investigation by state police, and it's not yet known what road or weather conditions may have played a role.
Who Responds When a Vehicle Goes Into the Water
Interstate 294 falls under the jurisdiction of Illinois State Police Troop 15, the dedicated unit assigned to patrol all 294 miles of the Illinois Tollway system and the agency responsible for investigating crashes like Wednesday's. Troop 15 handles more than 215,000 roadway incidents each year across the tollway network, per the Illinois Tollway. On the ground, the on-site fire and rescue response for this stretch of Deerfield falls to the Deerfield-Bannockburn Fire Protection District, which maintains specialized water rescue and dive capabilities and covers Deerfield, Bannockburn, and nearby unincorporated parts of Lake County.
That kind of technical water-rescue capacity isn't a rare deployment for the district. In November 2009, Deerfield-Bannockburn mobilized dive rescue teams, along with mutual aid crews, after a commercial worker drowned in a corporate retention pond on nearby Baxter Parkway, according to the district's own account preserved by Cardinal News. Wednesday's rescue drew on the same kind of specialized training, this time with a happier outcome for those pulled from the truck.
Why Open Water Sits So Close to the Tollway
The pond that swallowed the truck isn't incidental to the highway's design. Wet retention ponds and stormwater detention basins are built directly into the Illinois Tollway's rights-of-way to catch and filter high-volume runoff from the roadway before it reaches local waterways, according to Illinois Tollway engineering standards. Those basins help control flooding and filter pollutants, but they also mean a vehicle that leaves the pavement near an interchange like Lake Cook Road can end up in open water rather than on a shoulder or in a ditch.
The Lake Cook Road interchange, which sits along the border of Cook and Lake counties, has seen serious crashes before. In September 2025, a commercial truck driver died near the same interchange after colliding with a guardrail and catching fire on northbound I-294, according to a report from CBS Chicago at the time. The posted speed limit on this stretch of I-294, near Milepost 52.7 at Lake Cook Road, is 60 miles per hour under state administrative regulations.
How the Tollway Tracks and Reports Crashes
The Illinois Tollway monitors its entire 294-mile system in real time through its Traffic Operations Center, using TIMS2GO software and roadside cameras to help dispatchers spot incidents and coordinate emergency response, per data compiled by IBTTA. Live video feeds from those cameras can assist first responders as they arrive on scene, though it's not known whether footage from Wednesday's incident has been reviewed as part of the ongoing investigation.
Under Illinois law, drivers involved in crashes causing injury or property damage are required to remain at the scene and immediately report the incident to law enforcement, per 625 ILCS 5/11-401 as outlined by Staver Accident Injury Lawyers. Tollway collision reports are processed through state police, meaning any findings on how the truck left I-294 and entered the pond will ultimately come from Illinois State Police. As of Wednesday, the exact cause of the crash, the road conditions at the time, and the condition of the hospitalized victim had not been made public.
