When a neo-Nazi group called the National Socialist Movement volunteered last year to clean a Missouri highway, and get official recognition for it in the form of an Adopt-a-Highway sign, state officials felt powerless to refuse. So they took a rather clever tack.

Several years before, the Missouri Department of Transportation had lost a long legal battle to try and prevent the Ku Klux Klan from adopting a highway on freedom-of-speech grounds. So the state decided to counter the Nazi group’s speech with more speech, in the form of another roadside sign.

Officials are renaming the stretch of highway near Springfield that the organization cleans after Rabbi Abraham Joshua Heschel, who fled Nazi Germany and became a prominent Jewish theologian and civil rights advocate in the United States.

The renaming, which would take effect this summer, was approved by the legislature as part of a large transportation bill. The governor has not yet signed the bill but supports the concept of renaming the road, an aide said. The measure is not popular, though, with some members of the National Socialist Movement, who clean a half-mile stretch four times a year.