Add Illinois Tollway Pass Partnership (I-PASS Assist)

[hua7450]

Summary

Implements Illinois I-PASS Assist program eligibility. Closes #6781.

I-PASS Assist is an equity-focused initiative by the Illinois State Toll Highway Authority (Illinois Tollway) that makes tollway travel more accessible and affordable for income-eligible individuals and families.

Regulatory Authority

• Administering Agency: Illinois State Toll Highway Authority (Illinois Tollway)
• Verification Partner: Illinois Department of Revenue (income verification)
• Program Launch: June 23, 2021
• Legal Framework: Board-approved program under Toll Highway Act (605 ILCS 10/)

Sources:

• I-PASS Assist Program - Illinois Tollway
• IDHS: I-PASS Assist
• Illinois Tollway Expands I-PASS Assist Program (June 2021)

Eligibility Criteria

Income Eligibility

Household income must not exceed 250% of Federal Poverty Guidelines (FPL).

Income is verified by the Illinois Department of Revenue, so we use irs_gross_income as the income measure.

Family Size	2024 FPL	250% FPL Limit
1	$14,580	$36,450
2	$19,720	$49,300
3	$24,860	$62,150
4	$30,000	$75,000
5	$35,140	$87,850
6	$40,280	$100,700

Source: I-PASS Assist Program

Categorical Eligibility

Households receiving SNAP (Supplemental Nutrition Assistance Program) automatically qualify.

"Customers getting SNAP may be eligible for I-PASS Assist."

Source: IDHS: I-PASS Assist

Residency Requirement

Illinois residents only. Enforced via defined_for = StateCode.IL.

Benefits Provided (Not Modeled)

I-PASS Assist is an access program that reduces barriers to toll transponder ownership. Benefits depend on individual toll usage and are not modeled as calculable benefits.

Benefit	Standard I-PASS	I-PASS Assist
Transponder Deposit	$10	$0 (waived)
Account Opening Minimum	$20	$4
Auto-Replenishment Minimum	$10	$4
Invoice Fee Dismissal	No	Yes (eligible)
Free Transponder Shipping	No	Yes
Welcome Gift Card	No	Up to $20

Files Added

Parameters (1 file)

policyengine_us/parameters/gov/states/il/tollway/ipass_assist/
└── eligibility/
    └── fpg_limit.yaml                    # 250% FPL income limit

Variables (3 files)

policyengine_us/variables/gov/states/il/tollway/ipass_assist/
├── il_ipass_assist_eligible.py           # Final eligibility (income OR categorical)
├── il_ipass_assist_income_eligible.py    # Income <= 250% FPL
└── il_ipass_assist_categorical_eligible.py # SNAP receipt

Tests (4 files)

policyengine_us/tests/policy/baseline/gov/states/il/tollway/ipass_assist/
├── il_ipass_assist_income_eligible.yaml      # Income threshold tests
├── il_ipass_assist_categorical_eligible.yaml # SNAP pathway tests
├── il_ipass_assist_eligible.yaml             # Combined eligibility tests
└── integration.yaml                          # End-to-end scenarios

Example Calculations

Case 1: Single worker, $35,000 income

• 250% FPL for 1 person: $36,450
• $35,000 <= $36,450 → Income eligible
• Result: Eligible

Case 2: Family of 4, $90,000 income

• 250% FPL for 4 persons: $75,000
• $90,000 > $75,000 → NOT income eligible
• No SNAP → NOT categorical eligible
• Result: NOT eligible

Case 3: SNAP recipient with $50,000 income

• $50,000 > $36,450 → NOT income eligible
• Receives SNAP → Categorical eligible
• Result: Eligible (via categorical pathway)

Implementation Notes

• Uses irs_gross_income for income (verified by IL Dept of Revenue)
• Uses spm_unit_fpg for FPL calculations (scales with household size)
• Categorical eligibility checks actual SNAP benefit receipt (snap > 0)
• Residency enforced via defined_for = StateCode.IL

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (849bec6) to head (7ec80bb).
⚠️ Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #7174   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            1         3    +2     
  Lines           19        37   +18     
  Branches         1         0    -1     
=========================================
+ Hits            19        37   +18     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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[PavelMakarchuk]

LGTM after TANF is added