The ornamental design for an electric transportvehicle, as shown and described.
FIG. 1 is a front and right side perspective view of an electric transport vehicle;
FIG. 2 is a rear and right side perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a right side elevation view thereof; and,
FIG. 7 is a left side elevation view thereof.
The broken lines shown in the drawings illustrate portions of the electric transport vehicle that are environmental structures and form no part of the claimed design.