The MTA is once again seeking to save money by expanding the practice of running trains without a conductor. The One Person Train Operation program, or by its robot name, "OPTO," has been previously stopped in the courts after objections were raised by the Transit Workers Union. The only instance an arbitrator has allowed the OPTO plan is late nights and weekends on the G line. Now the MTA would like to expand it to 7, L, J and M lines as well. A TWU spokesman told the Daily News, "Of course, this is one of management's demands. This is something the MTA has been pursuing the last two or three bargaining rounds and we continue to completely disagree with them." The last fight between the two was in 2006; it's unclear if the same arbiters will rule in the union's favor again or if robojudges have since ascended within the court system.