The Transportation Board shall have general supervision and jurisdiction of common carriers, make rules, hold hearings, and issue certificates as may be required under the provisions of this chapter. No common carrier without first having given 30 days' notice to the Transportation Board and the Agency of Transportation shall abandon all or any part of its certificated authority or discontinue any service established under the provisions of this chapter, except it may discontinue a temporary service established incident to the certificated authority provided service is not in effect more than 60 days during any year and may suspend service temporarily by reason of road conditions or when ordered by the State or local authorities. A change in schedule or the elimination of a trip or trips established for experimental purposes or established to meet educational, athletic, convention, holiday, vacation, peak, seasonal, temporary, extraordinary, excursion, tour, mail, express, or newspaper traffic requirements shall not be deemed to constitute a discontinuance of service or an abandonment of authority by a common carrier of passengers. (Added 1985, No. 224 (Adj. Sess.), § 1; amended 1993, No. 172 (Adj. Sess.), § 7.)