Voters in the state of Illinois resoundingly voted to on Tuesday to amend the state’s constitution to include an amendment that controls funding for transportation infrastructure. The amendment dictates that all revenue raised through transportation taxes and fees must directly fund transportation projects.

Nicknamed by its proponents the “Safe Roads Amendment,” the initiative saw rare bipartisan support from Illinois’s Republican governor and its Democratic house speaker. Despite the amendment’s overall popularity among the electorate—receiving a 79% “yes” vote at the time of publishing—it was not without skeptics.

Both of Chicago’s major newspapers, the Chicago Sun Times and the Chicago Tribune, both spoke out against the amendment. Opponents of the amendment cited the fact that its wording was vague, which may lead difficulties for future yet-to-be-realized transportation methods. It was also pointed out that the major support for the amendment was coming from special interest groups such as trade unions and business groups that may see massive dividends from increased money going into transportation construction. Another concern is that the state will no longer be able to access transportation money in the case of disasters, which may require additional resources for recovery.

Proponents of the amendment, including the voting public, have highlighted the “lockbox” aspect of the amendment. Many see it as protection from an un-trusted government reallocating money that comes directly from consumers. The fees and taxes covered by the amendment include gas taxes and license and registration fees on any “public highways, roads, streets, bridges, mass transit, intercity passenger rail, ports, or airports.” The amendment needed 60% of the vote to be accepted into the state’s constitution. California, Maryland, and Wisconsin have all passed similar transportation “lockbox” measures in the past six years.

Southeast Michigan is also debating transportation in this year’s general election. At the time of publication, the vote for Regional Transit Authority of Southeast Michigan property tax millage was too close to call. The new tax would go to help fund a regional public transportation system which the area lacks.