Drivers on the autism spectrum who travel through Winnetka can hand police a bright blue envelope during a traffic stop, signaling their communication needs before a word is spoken.

The Winnetka Police Department announced it has joined the Blue Envelope Program, a free, voluntary initiative already used by more than 70 police departments across Illinois. Residents can pick up an envelope at no cost at the department's headquarters, 410 Green Bay Road. No proof of diagnosis or registration is required.

The envelope holds a driver's license, registration, proof of insurance and emergency contact information. It can also carry notes on communication preferences, sensory sensitivities or behaviors that could be misinterpreted during a stop. Winnetka officers have been trained to recognize the blue envelope and adjust their approach when one is presented.

The program is open to anyone on the autism spectrum who lives, works or regularly passes through the village. It does not exempt participants from traffic laws.

Neighboring Wilmette launched its own Blue Envelope Program on Jan. 29. The Wilmette Police Department said on X that envelopes are available at its lobby during business hours under the same no-cost, no-registration terms.

Gov. JB Pritzker signed House Bill 4472, which requires the Illinois Secretary of State to establish a statewide Blue Envelope Program, Capitol News Illinois reported. Secretary of State Alexi Giannoulias unveiled the effort on July 21, saying it would help law enforcement handle high-stress encounters. CBS News Chicago reported that similar programs exist in at least a dozen states.

Tamika Leché Morales, founder of the Autism Hero Project, spearheaded the bipartisan legislation. Her son Maximillian, who has autism, had just earned his learner's permit at the time of the July announcement. Morales said in July that she worries about what happens when flashing lights appear behind her son. "Will someone understand that anxiety doesn't always look like compliance?" she asked.

Free envelopes are expected to become available at Illinois Secretary of State DMV offices starting Jan. 1, 2027. Winnetka families do not have to wait. Envelopes are available at the Winnetka Police Department, 410 Green Bay Road.