It is to introduce the research result about the use of median strips on our domestic urban roads and streets. From the instructions on the minimal median width of car flow of countries in the world and the standards TCXDVN104-07, 22TCN273-01, associated with the analysis of actual survey data about the use of current median barriers through the criteria such as safety, speed, traffic volume, pedestrians, construction conditions... the authors have proposed type and size of the median for each street type. The research result helps engineers easily select and lay out median reasonably to have contribution to efficiency improvement of urban street operation.