LAS VEGAS >> Drivers are threatening to walk out in protest of Las Vegas’ largest cab company.

Drivers for Frias Transportation Management say they will stop working at 5 p.m. today (2 p.m. Hawaii time).

The Las Vegas Review-Journal reports that workers are protesting the terms of their contract, which was approved earlier this month by officials from United Steelworkers Union.

The strike would come at the end of a month that is often one of the busiest for Sin City. Last year, tourism numbers peaked in March.

The drivers say they want more pay and are angry that the union signed a contract without putting it to a member vote.

Frias employs nearly 2,000 drivers and operates five of Nevada’s 16 taxi brands.

Drivers at the city’s second largest cab company, Yellow Checker Star Transportation, have been on strike for three weeks over wages and benefits. That company includes three taxi brands.