About 75 people crammed into a room in Grapevine Thursday night to hear the latest update on the TEXRail commuter rail project and ask questions.

Area residents who gathered at the Community Activities Center for a public hearing wondered about everything from security concerns once the rail goes into DFW International Airport to why the train will use a diesel locomotive instead of a cleaner, quiet electrical system.

Security at the airport will be handled by DFW, which means baggage still will be screened; and diesel is being used for two reasons: one is cost, and the other is that TEXRail, a 37-mile commuter rail line, will run largely on existing tracks already used by freight trains along the corridor, rail officials said.

Residents also were concerned about preserving bike trails along the corridor and the ease of getting from the TEXRail station to the new DART station at the airport.

A key developer at the Stockyards in Fort Worth, the colorful cowboy Steve Murrin, and Grapevine City Councilwoman Sharron Spencer took issue with a planned change in the location of the station at the Stockyards. Grapevine is a key player, as one station will be in the downtown historic district, and city sales tax helps fund the project.

Both Murrin and Spencer said they feared the move would deter tourists from riding the train to shop in Grapevine. A shuttle from the train station to the heart of the Stockyards is included as part of the plan, TEXRail officials said.

Comments from two more public comment sessions tonight in Fort Worth are part of the federal requirements to document changes to the project and the environment since a Draft Environmental Impact Statement was filed in 2008 with an Environmental Assessment. Once a Final Environmental Assessment is complete, it will be disseminated publicly in area libraries and elsewhere, and residents will have 30 days to comment on it. That likely will be early next year.

The timeline calls for TEXRail to start service in 2016.

Missed the hearing? The TEXRail presentation and much more information is available at www.texrail.com.