Freeway incidents are associated with different impacts such as traffic congestion, delays, fuel consumption, secondary incidents etc. Secondary incidents are caused due to primary incidents and require the same personnel who are already engaged. This thesis studies various impacts caused by primary incident in space and time occurring on the freeways and these results are applied to identify secondary incidents. Three types of impacts are identified and proposed in this study. Dynamic nature of queue length in the direction of accident is studied. Dynamic nature of congestion in the opposite direction of the freeway till the accident is cleared is also studied. Dynamic nature of movement of distraction point on the opposite side of the freeway as the queue gets cleared in accident direction is studied. Finally, simulations are carried out by using Las Vegas freeway traffic volumes to show the effect of these impacts in Las Vegas region. The simulation results are applied to real time data to identify secondary incidents
