another name for a tree-lined promenade?

Answer 1

The allee is a feature that passes through a planted boscage (a small wood) that terminates in a framed view. The trees can be trimmed square. The squared, hedge on stilts style is a pleached allee.
Both avenues and allees are tree lined but the allee is a garden feature intended for strolling.
http://www.tryonpalace.org/pleachedallee.html
http://en.wikipedia.org/wiki/All%C3%A9e
The passage can be lined with shrubs like yew, or fruiting trees as well as ornamental trees. Linden and laburnum have been used in some famous settings as allee trees

The allee in modern concepts can be a long trellised arbor growing vines of edible plants or roses but part of it is still the idea of a framed view at the ends of the walkway.
http://www.gardening-howto.com/pruning-plants/pleached-allee.htm
http://www.scottarboretum.org/gardentour/metasequoia-allee/

Answer 2

Lane?

Answer 3

That would most definately be an avenue, by definition.

Answer 4

boulevard