govt.fyi
Illinois General Assembly · SB 1559 · Governor Approved

IDOT-TRAFFIC STUDIES

Introduced
Moved
Reached a final decision
Became law
Derived from the official record below.

Officially: “IDOT-TRAFFIC STUDIES Read the full text

Official title shown verbatim from the official record. Plain-language summary coming as coverage deepens. Not legal advice.
104th General Assembly

Where it is

Show all 38 actions
Filed with Secretary by Sen. Sara Feigenholtz · Feb 4, 2025

Senate

Referred to Assignments · Feb 4, 2025

Senate

Assigned to Transportation · Feb 11, 2025

Senate

Postponed - Transportation · Mar 5, 2025

Senate

Senate Committee Amendment No. 1 Filed with Secretary by Sen. Sara Feigenholtz · Mar 14, 2025

Senate

Senate Committee Amendment No. 1 Referred to Assignments · Mar 14, 2025

Senate

Senate Committee Amendment No. 1 Assignments Refers to Transportation · Mar 18, 2025

Senate

Senate Committee Amendment No. 1 Adopted · Mar 18, 2025

Senate

Do Pass as Amended Transportation; 015-000-000 · Mar 19, 2025

Senate

Placed on Calendar Order of 2nd Reading March 20, 2025 · Mar 19, 2025

Senate

Senate Floor Amendment No. 2 Filed with Secretary by Sen. Sara Feigenholtz · Apr 3, 2025

Senate

Senate Floor Amendment No. 2 Referred to Assignments · Apr 3, 2025

Senate

Senate Floor Amendment No. 2 Assignments Refers to Transportation · Apr 8, 2025

Senate

Senate Floor Amendment No. 2 Recommend Do Adopt Transportation; 019-000-000 · Apr 8, 2025

Senate

Senate Floor Amendment No. 2 Adopted; Feigenholtz · Apr 10, 2025

Senate

Placed on Calendar Order of 3rd Reading April 11, 2025 · Apr 10, 2025

Senate

Arrived in House · Apr 11, 2025

House

Chief House Sponsor Rep. Ann M. Williams · Apr 11, 2025

House

Referred to Rules Committee · Apr 11, 2025

House

Assigned to Transportation: Vehicles & Safety · Apr 17, 2025

House

Do Pass / Short Debate Transportation: Vehicles & Safety; 012-000-000 · Apr 30, 2025

House

Placed on Calendar 2nd Reading - Short Debate · Apr 30, 2025

House

Added Alternate Chief Co-Sponsor Rep. Jaime M. Andrade, Jr. · Apr 30, 2025

House

Added Alternate Chief Co-Sponsor Rep. Matt Hanson · Apr 30, 2025

House

Added Alternate Chief Co-Sponsor Rep. Margaret Croke · Apr 30, 2025

House

Added Alternate Chief Co-Sponsor Rep. Bradley Fritts · Apr 30, 2025

House

Added Alternate Co-Sponsor Rep. Martha Deuter · May 8, 2025

House

Added Alternate Co-Sponsor Rep. Will Guzzardi · May 9, 2025

House

Added Alternate Co-Sponsor Rep. Theresa Mah · May 9, 2025

House

Added Alternate Co-Sponsor Rep. Michael J. Coffey, Jr. · May 9, 2025

House

Added Alternate Co-Sponsor Rep. Wayne A. Rosenthal · May 9, 2025

House

Placed on Calendar Order of 3rd Reading - Short Debate · May 16, 2025

House

Added Alternate Co-Sponsor Rep. Anne Stava · May 20, 2025

House

Passed Both Houses · May 21, 2025

Senate

Added Alternate Co-Sponsor Rep. Kelly M. Cassidy · May 21, 2025

House

Sent to the Governor · Jun 18, 2025

Senate

Governor Approved · Aug 1, 2025

Senate

Effective Date January 1, 2026 · Aug 1, 2025

Senate

The numbers

13
sponsors on the bill

Sponsors

Sara FeigenholtzAnn M. WilliamsJaime M. Andrade, Jr.Matt HansonMargaret CrokeBradley FrittsMartha DeuterWill GuzzardiTheresa MahMichael J. Coffey, Jr.Wayne A. RosenthalAnne StavaKelly M. Cassidy

Recorded votes

THIRD READINGHouse · 2025-05-21 · PASSED · NAYS 0, PRESENT 0, YEAS 111
THIRD READINGSenate · 2025-04-11 · YEAS 52, NAYS 0, PRESENT 0
Roll-call results shown verbatim from the Illinois legislature’s records. A result reflects that roll call’s own motion, not the bill’s overall outcome.
Every fact on this page links to its source, starting with the official bill record. Last action: Effective Date January 1, 2026 (Aug 1, 2025).