RTD officials on Friday announced the removal of a slow zone speed restriction for northbound light rail trains between two stations in south metro Denver – along the Interstate 25 corridor at County Line and Dry Creek roads – saying this should improve travel times for people riding on the E and R lines. But riders will face additional slow zones this month as RTD inspectors looking for wear and tear target more track segments around RTD’s 120-mile rail system, according to agency website postings.