"We want to give customers more choice about where and when they get their parcels."
From the start of June, new delivery vehicles would be out on the street in New Plymouth, and by early July, delivery of letters and parcels to residential addresses would be combined.
"The new technology we're developing will help avoid the disappointment of a missed delivery, as customers will be able to tell us in advance what they want us to do with their parcels," said Ms Smout.
"Previous trials have shown the eco-vehicles are safe to use on the footpath. Our drivers receive safety training, and they will give way to all other footpath users."
Staff driving the eco-vehicles will have a specially designed uniform consisting of a black long-sleeved padded polo shirt and padded track pants with a combined New Zealand Post and CourierPost emblem.