A trap lane is a configuration where a travel lane becomes an exclusive left or right turn lane, thereby trapping the driver/rider that wishes to continue straight. Trap lanes increase the risk or side swipe and rear end crashes as drivers/riders try to escape the trap into a lane that provides their desired path of travel.  
Existing trap lanes should be replaced with a channelised turn lane where possible, and where not possible (or in the interim) highlighted well in advance with signs, arrow line marking and distinctive lane line marking.

Photos: Outbacktesla and Safe System Solutions