King said some agencies will fail to buy enough computer equipment to handle maintenance issues for their fleet and then have to send the units out to be diagnosed, which adds unnecessary time and costs to the repair of transit units.
“There’s no cost savings to buying new buses when you’re not buying the support equipment,” he said.
CNG growth changes bus maintenance
As more agencies continue to look past the traditional diesel powertrain, compressed and liquid natural gas fueled buses are increasingly common fuel choices.
Sandy Amores, chief of transit maintenance control for Miami-Dade Transit said the agency is meeting with the Federal Transit Administration regularly as the agency move towards adding CNG buses to its fleet and make the changes to upgrade maintenance facilities in order to work on them in a safe manner.
Amores said the agency will change one of its three maintenance garages in the short term with plans to upgrade all of them to service CNG in the next 10 years. Amores said there are also plenty of examples for Miami-Dade to follow in making the change succesfully.
“We know more or less what it takes from our peers running CNG and those who have recently converted to compressed natural gas,” he said. “We’re actually very excited about it.”
The Central Ohio Transit Authority (COTA) in Columbus, Ohio, is in the process of turning its entire bus fleet into CNG powered in the next 12 years, so in anticipation of the move, it spent nearly $33 million during an eight month period renovating and upgrading its McKinley Avenue bus maintenance and storage facility. COTA Facilities Manager Jon Hancock said in order to accommodate the CNG buses, the HVAC system needed to be upgraded to handle more air, lighting was upgraded, electric conduit was moved along with anything else that may create a spark within 18 inches of the ceiling.
Gas monitoring systems needed to be installed in the facility along with larger and faster shop doors to fit larger buses and allow errant gas to escape quicker. Monitoring equipment and other equipment need to work together in order to avoid potential gas buildups and the facility had to meet OSHA Class I Division 1 standard with sealed walls to prevent gas leaking into employee gathering areas.
Hancock said local fire department officials were invited to inspect the facility to determine how to respond if there’s an emergency at the facility.
“While on the east and west coasts this is old news, here in mid-America this is kind of a new technology for everybody,” he said. “While it’s an established technology it’s kind of new where we are.”
Initial capital cost and considerations may seem off putting to some agencies, but Hancock said the cheap cost of natural gas makes the return on investment worth the initial purchase.
“This is an opportunity. How many times in public transit have we spent money that really didn’t have a return on investment,” Hancock said. “This one has a significant return on investment with new buses and all this capital equipment and the payoff is in three years.”
An electrifying change
King said the advent of electric vehicles is going to change maintenance dramatically and the change means more agencies will need to think about installing power sources in maintenance facilities to work on the vehicles.
The change means many of the federal regulations on safety will no longer apply to shops, diesel and fuel tanks won’t need to be buried in the ground and lots of pollutants will no longer seep into areas surrounding the maintenance property.
“There’s no doubt about it in the larger transit agencies where the general managers get the money, they’re experimenting more and more with electric vehicles, whether it be in series or in parallel or whatever, but that seems to be a growing trend,” he said. “Or course as they do that, the interesting thing about these technologies and if we do go that route, it forces a change on everything and the makeup of the shop. It’s a change that people really don’t appreciate until they look into the rearview mirror and see the benefits down the road.”