A majority of U.S. travelers said they were satisfied with or neutral about airport security measures, a survey released Thursday says. But 67% said they couldn't tell whether the Transportation Security Administration's expedited PreCheck lanes made any significant difference in wait times.

Survey results from the Travel Leaders Group come the same week that TSA expanded PreCheck to international carrier Air Canada. The agency is opening more enrollment centers nationwide to process qualified fliers.

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When asked what security measures they would like to eliminate, 31.7% said removing their shoes, 24.1% said none, and 18.2% said limiting liquids in carry-on bags.

57.5% don't want to allow passengers to make cellphone calls in flight, 27.1% say it's OK but not for long conversations, and 5.8% said they were in favor of it.