Non Linear blend- Like telegraph poles in perspective

You can try to use Retangular Grid Tool to create such a object. Set settings as in capture then draw object. You can control number of vertical deviders and skew value.. Than select horizontal path with Direct selectionTool and delete them

You could use a Transform Effect with a single line.

If you want them the same size, expand Appearance and align the bottom anchor points and then the top ones.

You could start with a standard blend/

Draw a curve.

Select the blend and the curve and choose Object > Blend > Replace Spine.

Object > Blend > Expand.

Then Object > Blend > Ungroup.

Select half of the lines and delete them.

Select all of the lines. In the Align panel, align tops or bottoms or vertical centers.

Drag the handles on the blend spine: one longer, the other one shorter.