I retagged it to secondary instead of secondary link since it technically serves as the other carriageway of the road for that short distance rather than as a slipway as it's the only way for traffic to get from Industrial Park Road and onto Research Center Drive. I'm definitely more inclined to keep typical slipways like those at Prices Fork and Toms Creek/Stanger or Southgate and Duckpond as highway links instead of mainline roads since they only assist vehicles making turns and aren't part of the road itself.