For drag race actually to work, i used Impromptu races mod by Eddlm:
https://www.gta5-mods.com/scripts/impromptu-races

To install the mod, you must have Map Editor installed, then, you put the DragRace.xml file in your GTA V directory,
 folder where your gtav.exe is
When you are actually in the game, open Map Editor with F7 and choose 
Load Map, then type - DragRace - (with no - ), you should then get the loading screen and WAIT,
 it may take it a minute to load all the components, after that, you are good to go and to use your new drag race track !!!!

You need Map Editor 1.1 by Guadmaz, or newer version:
https://www.gta5-mods.com/scripts/map-editor
