What is the maximum weight of a vehicle that can undergo a two-speed idle test?

The correct answer is based on the regulatory standards established for emissions testing procedures. In Pennsylvania, a two-speed idle test is specifically designed for lighter vehicles. The maximum weight allowed for a vehicle to undergo this particular emissions test is 9,000 lbs. This limit is established to ensure the test's effectiveness, as vehicles above this weight typically require different testing methods due to their emissions profiles and operational characteristics.

Vehicles that exceed this weight limit can have more complex emissions systems and may not respond accurately in a two-speed idle test scenario. Therefore, testing protocols are catered to different weight classifications, ensuring compliance with emissions regulations and accurate assessment of vehicle emissions for effective environmental standards.