What is the percentage requirement for addresses on a route for Enhanced Carrier Route Walking Sequence Saturation (ECRWSS)?

The required percentage for addresses on a route for Enhanced Carrier Route Walking Sequence Saturation (ECRWSS) is 90% of residential addresses. This specification is essential for qualifying mail to benefit from saturation rates. The program is designed to optimize delivery efficiency by allowing carriers to deliver mail in a more organized fashion, emphasizing the importance of having a high concentration of addresses within the intended parameters.

The 90% requirement ensures that the majority of the route includes residential addresses, which enhances the viability of the saturation mailing plan. Although business addresses are also important, they do not play a role in this particular configuration. This focus on residential addresses helps target the delivery appropriately, maximizing the cost-effectiveness of the mailing while catering to the demographics of an area.