Dozens were detained and normal traffic on the busy road was restored after some time, police said.
The youths, working under Saakshar Bharat scheme, first assembled at Pratap Park and later blocked the Residency Road demanding release of their salaries.
"We are engaged under the scheme two years ago but so far no payment has been released in our favour," a protester told reporters.
"There are more than 8000 youths, including 4000 girls, rendering services under the scheme but the failure of the government to release their salaries have left them with no option but to hit the roads," he said.