\documentclass[tikz]{standalone}

\usepackage{tikz}
\usepackage{pgfplots}
\usepgfplotslibrary{polar}
\usetikzlibrary{shapes.geometric}

\usepackage{fontspec}
\setmainfont{Atkinson Hyperlegible}

\begin{document}

\def\circleradius{7.5}

\def\minute{2.6277}
\pgfmathparse{\minute/2}
\let\halfminute\pgfmathresult

\pgfplotstableread[col sep=comma]{times.csv}\data
\definecolor{one}{RGB}{243,155,154}
\definecolor{two}{RGB}{176,0,68}
\definecolor{three}{RGB}{213,173,0}
\definecolor{four}{RGB}{227,0,11}
\definecolor{five}{RGB}{0,150,94}
\definecolor{six}{RGB}{149,107,37}
\definecolor{seven}{RGB}{255,204,0}
\definecolor{fifteen}{RGB}{247,171,99}
\definecolor{sixteen}{RGB}{94,107,175}
\definecolor{twentyone}{RGB}{227,0,11}
\definecolor{twentytwo}{RGB}{253,195,0}
\definecolor{twentythree}{RGB}{228,142,0}
\definecolor{twentyfour}{RGB}{140,29,117}
\definecolor{twentysix}{RGB}{243,155,154}

\def\arcbetween#1#2#3#4{%
  \pgfplotstablegetelem{#1}{Time Angle}\of\data
  \pgfmathparse{\pgfplotsretval-30.975}
  \let\angleone\pgfmathresult
  \pgfplotstablegetelem{#2}{Time Angle}\of\data
  \pgfmathparse{\pgfplotsretval-30.975}
  \let\angletwo\pgfmathresult
  \pgfmathparse{\circleradius+0.1*#3}
  \let\radius\pgfmathresult
  \draw[ultra thick, color=#4] (\angleone:\radius) arc [start angle=\angleone, end angle=\angletwo, x radius=\radius, y radius=\radius];
}

\def\stop#1#2#3{%
  \pgfplotstablegetelem{#1}{Stop}\of\data
  \let\name\pgfplotsretval
  \pgfplotstablegetelem{#1}{Time Angle}\of\data
  \pgfmathparse{\pgfplotsretval-30.975}
  \let\angle\pgfmathresult
  \pgfmathparse{#2*0.1}
  \let\width\pgfmathresult
  \pgfmathparse{\circleradius+(#3*0.1)}
  \let\radius\pgfmathresult
  \node[anchor=east, rotate=\angle] at (\angle:\circleradius-0.5+0.05) {\footnotesize\name};
  % \draw[thick, fill=white] (\angle:5cm) circle [radius=0.5ex]  {};
  \draw[rounded corners=0.05cm, thick, fill=white, rotate=\angle, shift={(-0.05, -0.05)}] (0:\radius) rectangle ++(\width,0.1cm);
}

\def\legend#1{%
  % Circle for the legend
  \draw circle [radius=0.15cm];
  \draw[draw, color=black] circle [radius=\circleradius+2];
  \draw[thick] circle [radius=#1];
  \pgfmathparse{#1+0.2}
  \let\rmajor\pgfmathresult
  \pgfmathparse{#1+0.1}
  \let\rminor\pgfmathresult
  % Major ticks clockwise
  \draw[thick] (90:#1) -- (90:\rmajor);
  \foreach \i in {5,10,...,65} {
    \pgfmathparse{90-\i * 2.6277}
    \let\angle\pgfmathresult
    \draw[thick] (\angle:#1) -- (\angle:\rmajor);
    \node[anchor=west, rotate=\angle] at (\angle:\rmajor) {\scriptsize \i~min};
  }
  % Minor ticks clockwise
  \foreach \i in {1,2,...,65} {
    \pgfmathparse{90-\i * 2.6277}
    \let\angle\pgfmathresult
    \draw[thick] (\angle:#1) -- (\angle:\rminor);
  }
  % Major ticks anti-clockwise
  \foreach \i in {5,10,...,65} {
    \pgfmathparse{90+\i * 2.6277}
    \let\angle\pgfmathresult
    \draw[thick] (\angle:#1) -- (\angle:\rmajor);
    \node[anchor=east, rotate=\angle-180] at (\angle:\rmajor) {\scriptsize \i~min};
  }
  % Minor ticks anti-clockwise
  \foreach \i in {1,2,...,65} {
    \pgfmathparse{90+\i * 2.6277}
    \let\angle\pgfmathresult
    \draw[thick] (\angle:#1) -- (\angle:\rminor);
  }
  % Extra marks
  \draw[thick] (-90:#1) -- (-90:\rmajor);
  \node [isosceles triangle, anchor=east, fill=red, rotate=-90] (tringle) at (90:#1){};
  \node[anchor=south, rotate=0, color=red] at (tringle.west) {\footnotesize 0~min};
}

\def\bendin#1#2#3#4#5{%
  % First angle
  \pgfplotstablegetelem{#1}{Time Angle}\of\data
  \pgfmathparse{\pgfplotsretval-30.975}
  \let\angletwo\pgfmathresult
  % Second angle
  \pgfmathparse{\pgfplotsretval-30.975+#2*\halfminute}
  \let\anglethree\pgfmathresult
  \pgfmathparse{\circleradius+#3*0.1}
  \let\radius\pgfmathresult
  \draw[ultra thick, color=#5, rounded corners=#4*.5ex] 
    (\angletwo:\radius) -- (\anglethree:\radius) -- (\anglethree:\circleradius-0.5)
  ;
}

\def\bendout#1#2#3#4#5{%
  % First angle
  \pgfplotstablegetelem{#1}{Time Angle}\of\data
  \pgfmathparse{\pgfplotsretval-30.975}
  \let\angletwo\pgfmathresult
  % Second angle
  \pgfmathparse{\pgfplotsretval-30.975+#2*\halfminute}
  \let\anglethree\pgfmathresult
  \pgfmathparse{\circleradius+#3*0.1}
  \let\radius\pgfmathresult
  %
  \draw[ultra thick, color=#5, rounded corners=#4*.5ex] 
    (\angletwo:\radius) -- (\anglethree:\radius) -- (\anglethree:\circleradius+0.5)
  ;
}
\def\crossing#1#2#3#4{%
  \pgfplotstablegetelem{#1}{Time Angle}\of\data
  \pgfmathparse{\pgfplotsretval-30.975}
  \let\angleone\pgfmathresult
  \pgfplotstablegetelem{#2}{Time Angle}\of\data
  \pgfmathparse{\pgfplotsretval-30.975}
  \let\angletwo\pgfmathresult
  \pgfmathparse{(\angleone+\angletwo)/2+#3}
  \let\angle\pgfmathresult
  \draw[ultra thick, color=#4] (\angle:\circleradius-0.5) -- (\angle:\circleradius+0.5);
}

\def\citybetween#1#2#3{%
  \pgfplotstablegetelem{#1}{Time Angle}\of\data
  \pgfmathparse{\pgfplotsretval-30.975+\halfminute}
  \let\angleone\pgfmathresult
  \pgfplotstablegetelem{#2}{Time Angle}\of\data
  \pgfmathparse{\pgfplotsretval-30.975-\halfminute}
  \let\angletwo\pgfmathresult
  \pgfmathparse{2}
  \let\radius\pgfmathresult
  \draw[very thick, color=#3] (\angleone:\radius) arc [start angle=\angleone, end angle=\angletwo, x radius=\radius, y radius=\radius];
}

\begin{tikzpicture}
  % Circle for the line
  \draw[ultra thick, color=five] circle [radius=\circleradius];
  \crossing{18}{19}{-0.6*\halfminute}{five}
  \crossing{18}{19}{0}{two}
  \crossing{18}{19}{0.6*\halfminute}{seven}
  \crossing{28}{29}{0}{five}
  % Other lines
  % Mannheim
  \bendout{15}{-1}{1}{1}{six}
  \bendout{20}{1}{1}{1}{seven}
  \arcbetween{20}{24}{1}{seven} % 7 (again)
  \arcbetween{20}{25}{-1}{fifteen} % 15 (again)
  \bendin{20}{2.8}{-1}{4}{fifteen}
  \arcbetween{20}{25}{-2}{one} % 1
  \bendin{20}{2.2}{-2}{3}{one}
  \arcbetween{20}{22}{-3}{four}
  \bendin{20}{1.6}{-3}{2}{four}
  \arcbetween{20}{22}{-4}{three}
  \bendin{20}{1}{-4}{1}{three}
  % Paradeplatz
  \arcbetween{22}{25}{2}{six} % 6
  \arcbetween{24}{26}{-3}{four} % 4
  \bendout{22}{-1.0}{-3}{2}{four}
  \bendout{22}{-1.3}{-4}{2}{three}
  \bendout{22}{-0.7}{3}{1}{two}
  \bendin{22}{1.6}{3}{2}{two}
  \bendin{22}{1}{2}{1}{six}
  \bendin{24}{-1}{1}{1}{seven}
  \bendin{24}{1}{-3}{1}{four}
  % Main station
  \bendin{25}{-1.4}{-2}{1}{one}
  \arcbetween{25}{26}{1}{three}
  \bendin{25}{-2}{2}{2}{six}
  \bendin{26}{2}{2}{2}{six}
  \bendout{26}{-0.5}{2}{1}{six}
  \bendout{26}{-0.8}{1}{1}{three}
  \bendout{26}{-1.1}{-3}{1}{four}
  \arcbetween{27}{30}{-1}{two}
  \bendout{27}{0.6}{-1}{1}{two}
  \arcbetween{28}{30}{-2}{seven}
  \bendout{28}{1}{-2}{1}{seven}
  % Universitätsklinikum
  \bendin{30}{-1}{-2}{1}{seven}
  \bendin{30}{-1.6}{-1}{2}{two}
  \bendout{30}{1.6}{1}{2}{fifteen}
  \bendout{30}{1}{2}{1}{four}
  \arcbetween{30}{36}{1}{fifteen}
  \arcbetween{30}{32}{2}{four}
  \bendout{32}{-1}{2}{1}{four}
  \bendin{36}{-1.4}{1}{2}{fifteen}
  \bendin{36}{-0.8}{0}{1}{five}
  \bendout{37}{-1}{1}{1}{sixteen}
  % Heidelberg
  % Hans-Thoma Pl.
  \arcbetween{63}{64}{-1}{twentyfour} % 24
  \bendin{64}{-1}{-2}{1}{twentyone} % 21
  \bendin{64}{-1.6}{-1}{2}{twentyfour} % 24
  \arcbetween{63}{69}{1}{twentysix} % 26
  % Bismarckplatz
  \arcbetween{70}{73}{1}{twentyone} % 21
  \bendin{69}{-1.7}{1}{1}{twentysix} % 26 towards kirchheim
  \bendin{70}{1.7}{1}{1}{twentyone} % 21 towards hans-thoma (north)
  \bendin{73}{-0.8}{1}{1}{twentyone} % 21 towards hans-thoma (south)
  \arcbetween{69}{71}{2}{twentythree} % 23
  \arcbetween{69}{71}{3}{twentytwo} % 22
  % Stadtbücherei
  \bendout{71}{-0.7}{3}{1}{twentytwo} % 22 towards eppelheim
  \bendout{71}{-1}{2}{1}{twentythree} % 23 towards leimen
  \bendout{72}{0.7}{2}{1}{twentyfour}
  \arcbetween{72}{73}{2}{twentyfour} % 24 (again)
  \bendin{73}{-1.4}{2}{2}{twentyfour}
  % \arcbetween{64}{64}{1}{red} % 21 (again)
  % Stops
  \foreach \i in {1,...,14} { \stop{\i}{1}{0} }
  \stop{15}{2}{0}
  \foreach \i in {16,...,19} { \stop{\i}{1}{0} }
  \foreach \i in {20,...,21} { \stop{\i}{6}{-4} }
  \stop{22}{8}{-4}
  \stop{23}{5}{-2}
  \stop{24}{6}{-3}
  \stop{25}{6}{-3}
  % \foreach \i in {24,...,25} { \stop{\i}{4}{-1} }
  % \stop{25}{4}{-2}
  \stop{26}{6}{-3}
  \stop{27}{2}{-1}
  \stop{28}{3}{-2}
  \stop{29}{3}{-2}
  \stop{30}{5}{-2}
  \foreach \i in {31,...,32} { \stop{\i}{3}{0} }
  \foreach \i in {33,...,35} { \stop{\i}{2}{0} }
  \stop{36}{2}{0}
  \stop{37}{2}{0}
  \foreach \i in {38,...,62} { \stop{\i}{1}{0} }
  \stop{63}{3}{-1}
  \stop{64}{4}{-2}
  \foreach \i in {65,...,68} { \stop{\i}{2}{0} }
  \stop{69}{4}{0}
  \stop{70}{4}{0}
  \stop{71}{4}{0}
  \stop{72}{3}{0}
  \stop{73}{3}{0}
  % \draw[very thick, color=black] (-338.4202:2cm) arc [start angle=-338.4202, delta angle=-42.6014-30, x radius=2cm, y radius=2cm];
  % \citybetween{63}{9}{black}{}
  % \citybetween{16}{38}{black}{}
  % \citybetween{39}{43}{black}{}
  % \citybetween{44}{50}{black}{}
  % \citybetween{57}{59}{black}{}
  % \citybetween{60}{62}{black}{}
  \pgfmathparse{\circleradius-0.5}
  \draw[color=black] circle [radius=\pgfmathresult];
  \pgfmathparse{\circleradius+0.5}
  \draw[color=black] circle [radius=\pgfmathresult];
  \legend{\circleradius+0.6}
\end{tikzpicture}

\begin{tikzpicture}
  \legend{\circleradius+0.6}
\end{tikzpicture}

% \begin{tikzpicture}
%   \begin{polaraxis}[
%       xtick=data,
%       ytick=\empty,
%       xticklabels from table={\data}{Stop},
%       xticklabel style={
%         sloped like x axis={
%           allow upside down=true,
%           % execute for upside down=\tikzset{right},
%           % reset nontranslations=false,
%         },
%         left,
%         font=\scriptsize,
%         rotate=60,
%       },
%       xmin=-360, 
%       xmax=0,
%       rotate=-30,
%     ]
%     \addplot[draw=none, mark=none] table [x=Time Angle, y=Index] {\data};
%   \end{polaraxis}
% \end{tikzpicture}

\end{document}
% vim: conceallevel=0 nospell