It has to be a medium to large tree. Horizontal in habit. Have flowers, fruit, and winter beauty. And be disease resistant. The answer is (I think) Sargent Cherry. Prunus sargentii. Nothing is as exciting in early spring as Cherry blossoms, and a driveway lined with them could cause traffic accidents.
The Sargent Cherry doesn’t have the big ( I think overblown) double flowers of the Kwanzan Cherry. Sargent has a much more elegant, single layer of petals. It does get berries, though they aren’t very noticeable and don’t last through the winter. But oh, the bark in winter – lustrous, ruddy-brown with horizontal srtipes (lenticils. The bark is so elegant it looks artificial.
I think I’ve solved the design of the driveway. I think I have a new love
I’ve had a dream for about 15 years of a driveway lined on both sides with Hawthorne trees – specifically Crataegus viridis ‘Winter King’. I admire its ( admittedly malodorous) white flowers, its bright red berries that persist through the winter; but mostly it is the horizontal, openly irregular branching pattern that thrills me. I can see it giving a sense of destination along the driveway, a sheltering quality that anticipates the shelter to come. It leads the eye both upward and outward, saying “There is something worthwhile beyond”. And it is a four-season tree – I think I would grow it for the winter branching pattern alone.
However in Kansas the Red Cedar (Juniperus virginiana) is widespread. And unfortunately it co-hosts a fungus disease with apples and Hawthornes. Cedar Apple Rust and Cedar Hawthorne Rust. All the books say that ‘Winter King’ is the most resistant to rust. But ‘most resistant’ is not resistant. And Red Cedars are everywhere around our property. It’s native to this area. There are anti-fungal sprays that are effective. But that would become a permanent chore. And one of my goals is to plant things that are habitat-suitable, at least as much as possible.