The TD11520 utilizes the proven Boomerang Flexible e TD11520 utilizes the proven Boomerang Flexible Delineator with the Park-N-Guard Speed Bump to elineator with the Park-N-Guard Speed Bump to allow for a multitude of Channelizing designs. The unique llow for a multitude of Channelizing designs. The unique modular style allows for great varieties in the spacing of the odular style allows for great varieties in the spacing of the Delineator Posts in mountable median separation systems. elineator Posts in mountable median separation systems. The TD11520 is Perfect for emergency vehicle crossovers, he TD11520 is Perfect for emergency vehicle crossovers, railroad crossings, bicycle lanes, bus lanes, school zone ailroad crossings, bicycle lanes, bus lanes, scho