Railroads need to build 22,000 antenna towers across the country to implement positive train control and must apply to the Federal Communications Commission for each one. However, the FCC has asked the railroads to stop submitting applications because they have so many, according to Sen. John Thune, R-S.D. Another kink is that 565 American Indian tribes can review each and every application to ensure that no work is done on sacred ground -- something that will likely delay the installation process. Edward Hamberger, CEO and president of AAR, said he "was stunned" when he learned of this.

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