What vehicle characteristics influenced the change in testing standards from NCHRP Report 350 to MASH?

• A. Increased weight of passenger vehicles
• B. Smaller vehicle dimensions
• C. Increased height of trucks
• D. Improved engine efficiency

Answer: (A)

The transition from NCHRP Report 350 to MASH (Manual for Assessing Safety Hardware) was largely influenced by the increased weight of passenger vehicles. Over the years, there has been a notable trend toward heavier vehicles on the road. This change requires an updated approach to safety testing standards because heavier vehicles possess different dynamics that affect collision outcomes, such as increased momentum and energy during impacts.

In light of these developments, MASH standards were developed to address the safety performance of roadside hardware in the context of larger and heavier vehicles. Ensuring that safety barriers and other infrastructure can withstand impacts from these heavier vehicles is crucial for maintaining roadway safety and minimizing injury and damage during accidents. The enhanced testing protocols under MASH reflect the need for reliable performance when subjected to the forces generated by today's heavier vehicle fleet.