The set includes 26 track pieces shaped like letters of the alphabet, which can be connected to make a full track.
A motorized bus travels along the track. The set also includes plastic park benches, trees, signs and stand-up cutouts of Sesame characters -- Big Bird, Cookie Monster, Grover, Ernie and Bert.
It was made in 1989 by Hasbro, under the playschool label.
I think the original Alphabet roadway was made in 1988, and this contained people instead of the Sesame Street Characters.