tikz-trackschematic/doc/examples/minimal_working_example.tex

\documentclass{standalone}

% loading the library
\usepackage{tikz-trackschematic}

\begin{document} % LaTeX
  \begin{tikzpicture} % TikZ

    % draw a track with (x,y) coordinates
    \maintrack (0,0) -- (6,0);

    % place a train on the track
    \train[forward] at (5,0) label (T1);

  \end{tikzpicture}
\end{document}