Season pass holders at Six Flags Over Texas can now expect to move through the front gate more quickly when the US amusement park switches to a finger-scanning system for entry.

The move comes after a successful test of the biometric scan system at three of the operator's theme parks last summer.

Jay Thomas, vice president of Six Flags' project management office and information technology, said the test was driven by the group's continued desire to further improve the guest experience.

The finger scan has eliminated an extra processing line for season pass holders, which at times could be long, Thomas said. "That's what drove the biometrics at the front gate. It makes the process a whole lot easier."