Enlarge By Chris Gardner, Getty Images Drivers upset by increasing gas prices attend a truck stop rally Saturday in Harrisburg, Pa. A convoy to the state capitol is planned. Facing mounting diesel fuel costs and shrinking profits, some truckers nationwide are making plans to protest this week by parking their semis or clogging traffic by driving slowly. The truckers say average diesel gas prices, which AAA reported had risen over the past month from $3.38 to $3.91 a gallon nationally as of Friday, are forcing some drivers out of business. MORE: Record fuel prices blow budgets RELATED: Automakers pump up models with diesel power Independent trucker Bob Kuzniar, 60, of Churubusco, Ind., who drives a 200-gallon semitrailer, said that though there is no centrally organized effort, he has heard some truckers plan to call in sick today to protest. He said there are plans for truckers across the nation to pull over and park for two to three hours starting midnight on Tuesday. Indiana State Police Sgt. Kim Riley says he's aware of the truckers' protest plans but doesn't think they will cause major traffic disruptions. His officers will be on the lookout for problems, he says, including motorists who might get frustrated if truckers slow traffic. "We just want to make sure that road rage isn't going to be a problem," Riley says. Pennsylvania State Police spokeswoman Linette Quinn says her department expects truckers to form a convoy along Interstate 81 this morning and converge on the Capitol in Harrisburg. "If there is any need for additional response, we'll make appropriate changes," she says. Kuzniar said his fuel costs more than doubled from $1,255 a week at the beginning of January to $2,684 last week. "As fuel prices go up, so do delivery costs," Kuzniar said. "That gets passed on to the consumer." Dana Greenlaw, 40, an independent driver from Ontario, Canada, said he plans to participate in the shutdown Tuesday. "Out West, I've been paying $4.20 a gallon. In Canada, it's already over $5. It's not pretty," Greenlaw said. Independent drivers are being squeezed by the soaring price of fuel, said Norita Taylor, spokeswoman for the Grain Valley, Mo.-based Owner-Operator Independent Drivers Association, which has 160,000 members. "They're faced with the slow economy, there's less freight than trucks, and then you have diesel prices jumping in a volatile manner over a short period of time," Taylor said. George Vincent, 44, a driver from Monroe, Mich., doesn't support a trucker strike because he fears it will "throw the economy into a spiral." Vincent said he copes by spending more time on the road. "I don't know how some people are making it. I have to work more to earn less." © Copyright 2007 USA TODAY, a division of Gannett Co. Inc. Conversation guidelines: USA TODAY welcomes your thoughts, stories and information related to this article. Please stay on topic and be respectful of others. Keep the conversation appropriate for interested readers across the map.