Complex sentence: The ICC can be traced to plans developed in the 1950s for an Outer Beltway, but the current route of the ICC follows that alignment only from a point near the site of the National Capital Trolley Museum east to U.S.1 (Baltimore Avenue) in Beltsville.
Split into simpler sentences: The ICC can be traced to plans developed in the 1950s for an Outer Beltway. The current route of the ICC follows the original Outer Beltway alignment only from a point near the site of the National Capital Trolley Museum east to U.S.1 (Baltimore Avenue) in Beltsville.