How to make a road lane for a synthetic image in gray scale?

I'm trying to make a synthetic image in gray scale with some lines to simulate a road lane similar to the image attached. I appreciate any help.

Answer 1

[Massimo Zanetti]

Here it is:

%create one element
Z = zeros(100,101);
%lateral lanes
Z(:,[11:15,87:91]) = 1;
%mid lane (dashed)
Z(1:50,49:53) = 1;

%repeat element N times to create the road pattern
N = 4;
Z = repmat(Z,N,1);

%show image
imshow(Z);

[Erika]

You are a life saver! Thanks a lot.