Video footage aired by a private news channel also purportedly showed Kadam abusing the all-female staff at the booth.
Police said that Kadam apparently lost his cool because the staff demanded toll from him while the MLAs are exempted from toll.
Kadam was travelling in a private car at the time.
However, police authorities could not confirm if any case had been registered against Kadam, who represents Niphad constituency in Maharashtra Assembly.
While the MLA was present during the incident, he later denied that he had instigated or led the attack.
In an unrelated incident, toll recovery at Mangrulphata on the Mumbai-Agra national highway was affected after Chandwad MLA Shirish Kotwal (independent) and his supporters started an agitation this morning demanding an underground subway at Vadalibhoi in Nashik district.