Editing Crash incompatibility (section)

== Solutions ==
There has been extensive research and testing done by NHTSA, other governments, research organizations as well as automobile manufacturers to find solutions that improve safety in the small cars when colliding with larger vehicles. In the United States, a group of experts proposed major steps to improve compatibility<ref>{{Cite web |url=http://www.autoalliance.org/archives/archive.php?id=56&cat=Press%20Releases |title=The Alliance of Automobile Manufacturers |access-date=2006-11-03 |archive-date=2006-09-23 |archive-url=https://web.archive.org/web/20060923193204/http://www.autoalliance.org/archives/archive.php?id=56&cat=Press%20Releases |url-status=dead }}</ref> and these have been accepted as a voluntary regulation by American automotive manufacturers as well as by most other companies selling vehicles in the U.S. The Canadian government has also accepted these recommendations. The recommendations require all manufacturers to either (a) lower the height of the primary structure (also called frame rail) of all SUV and pickup trucks so that they overlap the primary structure of the cars; or (b) add another structure (called Secondary Energy Absorbing Structure) to the SUVs and pickup truck that cannot meet the first option. Latest studies have shown that these have improved the safety in cars when struck by SUVs. However, no such benefit has been observed in pickup truck to car crashes.  It is unclear whether or not certain aftermarket modifications are taken into account, such as "lift kits" which raise the frame or suspension of a vehicle for increased ground clearance.  Such modifications would likely greatly reduce the effectiveness of modern auto-safety advances due to causing the rigid parts of a pickup or SUV to strike the weaker parts of lower vehicles, rather than the reinforced regions in an accident.  State laws regarding the use of such modifications vary widely, and many have laws that aren't enforced.  As of now, there are no Federal laws regarding the bumper height of trucks and SUV's.