Complex sentence: However tangential turnouts still lack a smooth transition where the switch blade contacts the main rail, so there is still some jolt as the train passes over, though it is a much smaller jolt than with the old-style turnouts.
Split into simpler sentences: However tangential turnouts still lack a smooth transition where the switch blade contacts the main rail, so there is still some jolt as the train passes over. It's a much smaller jolt than with the old-style turnouts.