The Prius Plug-In Hybrid has a standard Secondary Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Kona Electric doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.
Both the Prius Plug-In Hybrid and the Kona Electric have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front and rear seatbelt pretensioners, front wheel drive, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning, driver alert monitors and available around view monitors.
Side impacts caused 23% of all road fatalities in 2018, down from 29% in 2003, when the Insurance Institute for Highway Safety introduced its side barrier test. In order to continue improving vehicle safety, the IIHS has started using a more severe side impact test: 37 MPH (up from 31 MPH), with a 4180-pound barrier (up from 3300 pounds). The results of this newly developed test demonstrates that the Toyota Prius Plug-In Hybrid is safer than the Kona Electric:
|   
  | 
     Prius Plug-In Hybrid  | 
     Kona Electric  | 
  
|   Overall Evaluation  | 
     GOOD  | 
     GOOD  | 
  
|   
  | 
     Driver Injury Measures  | 
  |
|   Head/Neck  | 
     GOOD  | 
     GOOD  | 
  
|   Torso  | 
     ACCEPTABLE  | 
     ACCEPTABLE  | 
  
|   Torso Max Deflection  | 
     1.46 in  | 
     1.57 in  | 
  
|   Torso Deflection Rate  | 
     9 MPH  | 
     9 MPH  | 
  
|   Pelvis  | 
     GOOD  | 
     ACCEPTABLE  | 
  
|   Pelvis Force  | 
     759 lbs.  | 
     915 lbs.  | 
  
|   Head Protection  | 
     GOOD  | 
     GOOD  | 
  
|   
  | 
     Passenger Injury Measures  | 
  |
|   Head/Neck  | 
     GOOD  | 
     GOOD  | 
  
|   Head Injury Criterion  | 
     246  | 
     282  | 
  
|   Neck Tension  | 
     45 lbs.  | 
     67 lbs.  | 
  
|   Torso  | 
     GOOD  | 
     ACCEPTABLE  | 
  
|   Shoulder Deflection  | 
     1.42 in  | 
     2.09 in  | 
  
|   Shoulder Force  | 
     268 lbs.  | 
     335 lbs.  | 
  
|   Torso Max Deflection  | 
     1.06 in  | 
     1.61 in  | 
  
|   Torso Deflection Rate  | 
     5 MPH  | 
     10 MPH  | 
  
|   Pelvis  | 
     GOOD  | 
     GOOD  | 
  
|   Pelvis Force  | 
     692 lbs.  | 
     759 lbs.  | 
  
|   Head Protection  | 
     GOOD  | 
     GOOD  | 
  

