Making motorway with TikZ

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











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Consider the following MWE:



documentclass[border=5pt,tikz]standalone
usetikzlibrarycalc
tikzset
 car/.style=
 scale=.5,minimum width=.1cm,minimum height=.5cm,fill=#1
 

begindocument
foreach n in 0,10,...,360,350,340,...,0

 begintikzpicture
 fill[green!60!black] ([xshift=1mm,yshift=-1mm]1,0) rectangle ([xshift=-1mm,yshift=1mm]4,-3);
 path ([xshift=1mm,yshift=-1mm]1,0) -- ([xshift=-1mm,yshift=1mm]4,-3) node[midway,fill=green!40!black,circle,inner sep=.3cm] (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above right=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below right=.5cm] at (a) ;
 draw[double distance=2mm,double=gray] (5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1);
 draw[white,densely dashed] (5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1);
 node[shift=(0,1),car=red,rotate=n] at (n:1) ;
 node[shift=(5,1),car=blue,rotate=-n] at (-n:1) ;
 node[shift=(0,-4),car=green,rotate=-n] at (-n:1) ;
 node[shift=(5,-4),car=yellow,rotate=n] at (n:1) ;
 pgfmathsetmacrofactorn/360
 node[rotate=-90,car=purple] at ($(0,0)!factor!(5,0)$) ;
 node[rotate=-90,car=violet] at ($(5,-3)!factor!(0,-3)$) ;
 node[car=brown] at ($(4,1)!factor!(4,-4)$) ;
 node[car=orange] at ($(1,-3)!factor!(1,0)$) ;
 endtikzpicture

enddocument


Here is the output:



Screenshot



My questions is: How can I make the cars to move along those “arc-parts“ of the track? I would have work with ifnum, but I think it is too laborius …






tikz-pgf nodes fun







share|improve this question



















  • 1




    Can't you just define the full thing to be one path and then place the cars via decorations.matkings?
    – marmot
    6 hours ago














up vote
9
down vote

favorite
1












Consider the following MWE:



documentclass[border=5pt,tikz]standalone
usetikzlibrarycalc
tikzset
 car/.style=
 scale=.5,minimum width=.1cm,minimum height=.5cm,fill=#1
 

begindocument
foreach n in 0,10,...,360,350,340,...,0

 begintikzpicture
 fill[green!60!black] ([xshift=1mm,yshift=-1mm]1,0) rectangle ([xshift=-1mm,yshift=1mm]4,-3);
 path ([xshift=1mm,yshift=-1mm]1,0) -- ([xshift=-1mm,yshift=1mm]4,-3) node[midway,fill=green!40!black,circle,inner sep=.3cm] (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above right=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below right=.5cm] at (a) ;
 draw[double distance=2mm,double=gray] (5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1);
 draw[white,densely dashed] (5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1);
 node[shift=(0,1),car=red,rotate=n] at (n:1) ;
 node[shift=(5,1),car=blue,rotate=-n] at (-n:1) ;
 node[shift=(0,-4),car=green,rotate=-n] at (-n:1) ;
 node[shift=(5,-4),car=yellow,rotate=n] at (n:1) ;
 pgfmathsetmacrofactorn/360
 node[rotate=-90,car=purple] at ($(0,0)!factor!(5,0)$) ;
 node[rotate=-90,car=violet] at ($(5,-3)!factor!(0,-3)$) ;
 node[car=brown] at ($(4,1)!factor!(4,-4)$) ;
 node[car=orange] at ($(1,-3)!factor!(1,0)$) ;
 endtikzpicture

enddocument


Here is the output:



Screenshot



My questions is: How can I make the cars to move along those “arc-parts“ of the track? I would have work with ifnum, but I think it is too laborius …






tikz-pgf nodes fun







share|improve this question



















  • 1




    Can't you just define the full thing to be one path and then place the cars via decorations.matkings?
    – marmot
    6 hours ago












up vote
9
down vote

favorite
1









up vote
9
down vote

favorite
1






1





Consider the following MWE:



documentclass[border=5pt,tikz]standalone
usetikzlibrarycalc
tikzset
 car/.style=
 scale=.5,minimum width=.1cm,minimum height=.5cm,fill=#1
 

begindocument
foreach n in 0,10,...,360,350,340,...,0

 begintikzpicture
 fill[green!60!black] ([xshift=1mm,yshift=-1mm]1,0) rectangle ([xshift=-1mm,yshift=1mm]4,-3);
 path ([xshift=1mm,yshift=-1mm]1,0) -- ([xshift=-1mm,yshift=1mm]4,-3) node[midway,fill=green!40!black,circle,inner sep=.3cm] (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above right=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below right=.5cm] at (a) ;
 draw[double distance=2mm,double=gray] (5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1);
 draw[white,densely dashed] (5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1);
 node[shift=(0,1),car=red,rotate=n] at (n:1) ;
 node[shift=(5,1),car=blue,rotate=-n] at (-n:1) ;
 node[shift=(0,-4),car=green,rotate=-n] at (-n:1) ;
 node[shift=(5,-4),car=yellow,rotate=n] at (n:1) ;
 pgfmathsetmacrofactorn/360
 node[rotate=-90,car=purple] at ($(0,0)!factor!(5,0)$) ;
 node[rotate=-90,car=violet] at ($(5,-3)!factor!(0,-3)$) ;
 node[car=brown] at ($(4,1)!factor!(4,-4)$) ;
 node[car=orange] at ($(1,-3)!factor!(1,0)$) ;
 endtikzpicture

enddocument


Here is the output:



Screenshot



My questions is: How can I make the cars to move along those “arc-parts“ of the track? I would have work with ifnum, but I think it is too laborius …






tikz-pgf nodes fun







share|improve this question















Consider the following MWE:



documentclass[border=5pt,tikz]standalone
usetikzlibrarycalc
tikzset
 car/.style=
 scale=.5,minimum width=.1cm,minimum height=.5cm,fill=#1
 

begindocument
foreach n in 0,10,...,360,350,340,...,0

 begintikzpicture
 fill[green!60!black] ([xshift=1mm,yshift=-1mm]1,0) rectangle ([xshift=-1mm,yshift=1mm]4,-3);
 path ([xshift=1mm,yshift=-1mm]1,0) -- ([xshift=-1mm,yshift=1mm]4,-3) node[midway,fill=green!40!black,circle,inner sep=.3cm] (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above right=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below right=.5cm] at (a) ;
 draw[double distance=2mm,double=gray] (5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1);
 draw[white,densely dashed] (5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1);
 node[shift=(0,1),car=red,rotate=n] at (n:1) ;
 node[shift=(5,1),car=blue,rotate=-n] at (-n:1) ;
 node[shift=(0,-4),car=green,rotate=-n] at (-n:1) ;
 node[shift=(5,-4),car=yellow,rotate=n] at (n:1) ;
 pgfmathsetmacrofactorn/360
 node[rotate=-90,car=purple] at ($(0,0)!factor!(5,0)$) ;
 node[rotate=-90,car=violet] at ($(5,-3)!factor!(0,-3)$) ;
 node[car=brown] at ($(4,1)!factor!(4,-4)$) ;
 node[car=orange] at ($(1,-3)!factor!(1,0)$) ;
 endtikzpicture

enddocument


Here is the output:



Screenshot



My questions is: How can I make the cars to move along those “arc-parts“ of the track? I would have work with ifnum, but I think it is too laborius …






tikz-pgf nodes fun




tikz-pgf nodes fun






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 7 hours ago

























asked 7 hours ago









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  • 1




    Can't you just define the full thing to be one path and then place the cars via decorations.matkings?
    – marmot
    6 hours ago












  • 1




    Can't you just define the full thing to be one path and then place the cars via decorations.matkings?
    – marmot
    6 hours ago







1




1




Can't you just define the full thing to be one path and then place the cars via decorations.matkings?
– marmot
6 hours ago




Can't you just define the full thing to be one path and then place the cars via decorations.matkings?
– marmot
6 hours ago










1 Answer
1






active

oldest

votes

















up vote
4
down vote













Just for fun: a simple way to put the car at an arbitrary position of the road path. To make @DavidCarlisle happy, cars drive on the wrong side of the road.



documentclass[border=5pt,tikz]standalone
usetikzlibrarycalc,decorations.markings
tikzset
 car/.style=
 scale=.5,minimum width=.1cm,minimum height=.5cm,fill=#1
 ,
 car on road/.style args=at pos #1 with dist #2 and color #3decorate,decoration=markings,
 mark=at position #1 with path (-2pt,#2) coordinate (aux1) 
 (2pt,#2) coordinate (aux2);
 pgftransformreset
 path let p1=($(aux2)-(aux1)$),n1=90+atan2(y1,x1) in
 ($(aux2)!0.5!(aux1)$) node[car=#3,rotate=n1];

begindocument
defroadpath(5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1)
foreach n in 0,5,...,355

 begintikzpicture
 fill[green!60!black] ([xshift=1mm,yshift=-1mm]1,0) rectangle ([xshift=-1mm,yshift=1mm]4,-3);
 path ([xshift=1mm,yshift=-1mm]1,0) -- ([xshift=-1mm,yshift=1mm]4,-3) node[midway,fill=green!40!black,circle,inner sep=.3cm] (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above right=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below right=.5cm] at (a) ;
 draw[double distance=3mm,double=gray] roadpath;
 draw[white,densely dashed] roadpath;
 pgfmathsetmacrofactorn/360
 path[car on road=at pos factor with dist 1mm and color red] roadpath;
 path[car on road=at pos 1-factor with dist -1mm and color blue] roadpath;
 pgfmathsetmacrofactormod(n/360+0.5,1)
 path[car on road=at pos factor with dist 1mm and color cyan] roadpath;
 path[car on road=at pos 1-factor with dist -1mm and color orange] roadpath;
 endtikzpicture

enddocument


enter image description here






share|improve this answer
















  • 1




    +1 for the wrong side of the road :-D
    – egreg
    2 hours ago










  • @egreg Of course, in Italy they drive on the right side. And since in the UK they drive on the opposite side, and since the opposite of right is wrong, there is only one possible conclusion ;-)
    – marmot
    2 hours ago










  • chat.stackexchange.com/transcript/message/30630373#30630373
    – egreg
    2 hours ago










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1 Answer
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1 Answer
1






active

oldest

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active

oldest

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active

oldest

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up vote
4
down vote













Just for fun: a simple way to put the car at an arbitrary position of the road path. To make @DavidCarlisle happy, cars drive on the wrong side of the road.



documentclass[border=5pt,tikz]standalone
usetikzlibrarycalc,decorations.markings
tikzset
 car/.style=
 scale=.5,minimum width=.1cm,minimum height=.5cm,fill=#1
 ,
 car on road/.style args=at pos #1 with dist #2 and color #3decorate,decoration=markings,
 mark=at position #1 with path (-2pt,#2) coordinate (aux1) 
 (2pt,#2) coordinate (aux2);
 pgftransformreset
 path let p1=($(aux2)-(aux1)$),n1=90+atan2(y1,x1) in
 ($(aux2)!0.5!(aux1)$) node[car=#3,rotate=n1];

begindocument
defroadpath(5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1)
foreach n in 0,5,...,355

 begintikzpicture
 fill[green!60!black] ([xshift=1mm,yshift=-1mm]1,0) rectangle ([xshift=-1mm,yshift=1mm]4,-3);
 path ([xshift=1mm,yshift=-1mm]1,0) -- ([xshift=-1mm,yshift=1mm]4,-3) node[midway,fill=green!40!black,circle,inner sep=.3cm] (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above right=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below right=.5cm] at (a) ;
 draw[double distance=3mm,double=gray] roadpath;
 draw[white,densely dashed] roadpath;
 pgfmathsetmacrofactorn/360
 path[car on road=at pos factor with dist 1mm and color red] roadpath;
 path[car on road=at pos 1-factor with dist -1mm and color blue] roadpath;
 pgfmathsetmacrofactormod(n/360+0.5,1)
 path[car on road=at pos factor with dist 1mm and color cyan] roadpath;
 path[car on road=at pos 1-factor with dist -1mm and color orange] roadpath;
 endtikzpicture

enddocument


enter image description here






share|improve this answer
















  • 1




    +1 for the wrong side of the road :-D
    – egreg
    2 hours ago










  • @egreg Of course, in Italy they drive on the right side. And since in the UK they drive on the opposite side, and since the opposite of right is wrong, there is only one possible conclusion ;-)
    – marmot
    2 hours ago










  • chat.stackexchange.com/transcript/message/30630373#30630373
    – egreg
    2 hours ago














up vote
4
down vote













Just for fun: a simple way to put the car at an arbitrary position of the road path. To make @DavidCarlisle happy, cars drive on the wrong side of the road.



documentclass[border=5pt,tikz]standalone
usetikzlibrarycalc,decorations.markings
tikzset
 car/.style=
 scale=.5,minimum width=.1cm,minimum height=.5cm,fill=#1
 ,
 car on road/.style args=at pos #1 with dist #2 and color #3decorate,decoration=markings,
 mark=at position #1 with path (-2pt,#2) coordinate (aux1) 
 (2pt,#2) coordinate (aux2);
 pgftransformreset
 path let p1=($(aux2)-(aux1)$),n1=90+atan2(y1,x1) in
 ($(aux2)!0.5!(aux1)$) node[car=#3,rotate=n1];

begindocument
defroadpath(5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1)
foreach n in 0,5,...,355

 begintikzpicture
 fill[green!60!black] ([xshift=1mm,yshift=-1mm]1,0) rectangle ([xshift=-1mm,yshift=1mm]4,-3);
 path ([xshift=1mm,yshift=-1mm]1,0) -- ([xshift=-1mm,yshift=1mm]4,-3) node[midway,fill=green!40!black,circle,inner sep=.3cm] (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above right=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below right=.5cm] at (a) ;
 draw[double distance=3mm,double=gray] roadpath;
 draw[white,densely dashed] roadpath;
 pgfmathsetmacrofactorn/360
 path[car on road=at pos factor with dist 1mm and color red] roadpath;
 path[car on road=at pos 1-factor with dist -1mm and color blue] roadpath;
 pgfmathsetmacrofactormod(n/360+0.5,1)
 path[car on road=at pos factor with dist 1mm and color cyan] roadpath;
 path[car on road=at pos 1-factor with dist -1mm and color orange] roadpath;
 endtikzpicture

enddocument


enter image description here






share|improve this answer
















  • 1




    +1 for the wrong side of the road :-D
    – egreg
    2 hours ago










  • @egreg Of course, in Italy they drive on the right side. And since in the UK they drive on the opposite side, and since the opposite of right is wrong, there is only one possible conclusion ;-)
    – marmot
    2 hours ago










  • chat.stackexchange.com/transcript/message/30630373#30630373
    – egreg
    2 hours ago












up vote
4
down vote










up vote
4
down vote









Just for fun: a simple way to put the car at an arbitrary position of the road path. To make @DavidCarlisle happy, cars drive on the wrong side of the road.



documentclass[border=5pt,tikz]standalone
usetikzlibrarycalc,decorations.markings
tikzset
 car/.style=
 scale=.5,minimum width=.1cm,minimum height=.5cm,fill=#1
 ,
 car on road/.style args=at pos #1 with dist #2 and color #3decorate,decoration=markings,
 mark=at position #1 with path (-2pt,#2) coordinate (aux1) 
 (2pt,#2) coordinate (aux2);
 pgftransformreset
 path let p1=($(aux2)-(aux1)$),n1=90+atan2(y1,x1) in
 ($(aux2)!0.5!(aux1)$) node[car=#3,rotate=n1];

begindocument
defroadpath(5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1)
foreach n in 0,5,...,355

 begintikzpicture
 fill[green!60!black] ([xshift=1mm,yshift=-1mm]1,0) rectangle ([xshift=-1mm,yshift=1mm]4,-3);
 path ([xshift=1mm,yshift=-1mm]1,0) -- ([xshift=-1mm,yshift=1mm]4,-3) node[midway,fill=green!40!black,circle,inner sep=.3cm] (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above right=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below right=.5cm] at (a) ;
 draw[double distance=3mm,double=gray] roadpath;
 draw[white,densely dashed] roadpath;
 pgfmathsetmacrofactorn/360
 path[car on road=at pos factor with dist 1mm and color red] roadpath;
 path[car on road=at pos 1-factor with dist -1mm and color blue] roadpath;
 pgfmathsetmacrofactormod(n/360+0.5,1)
 path[car on road=at pos factor with dist 1mm and color cyan] roadpath;
 path[car on road=at pos 1-factor with dist -1mm and color orange] roadpath;
 endtikzpicture

enddocument


enter image description here






share|improve this answer












Just for fun: a simple way to put the car at an arbitrary position of the road path. To make @DavidCarlisle happy, cars drive on the wrong side of the road.



documentclass[border=5pt,tikz]standalone
usetikzlibrarycalc,decorations.markings
tikzset
 car/.style=
 scale=.5,minimum width=.1cm,minimum height=.5cm,fill=#1
 ,
 car on road/.style args=at pos #1 with dist #2 and color #3decorate,decoration=markings,
 mark=at position #1 with path (-2pt,#2) coordinate (aux1) 
 (2pt,#2) coordinate (aux2);
 pgftransformreset
 path let p1=($(aux2)-(aux1)$),n1=90+atan2(y1,x1) in
 ($(aux2)!0.5!(aux1)$) node[car=#3,rotate=n1];

begindocument
defroadpath(5,0) -- (0,0) arc(-90:-360:1) --+ (0,-5) arc(0:-270:1) --+ (5,0) arc(90:-180:1) --+ (0,5) arc(180:-90:1)
foreach n in 0,5,...,355

 begintikzpicture
 fill[green!60!black] ([xshift=1mm,yshift=-1mm]1,0) rectangle ([xshift=-1mm,yshift=1mm]4,-3);
 path ([xshift=1mm,yshift=-1mm]1,0) -- ([xshift=-1mm,yshift=1mm]4,-3) node[midway,fill=green!40!black,circle,inner sep=.3cm] (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,above right=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below left=.5cm] at (a) ;
 node[fill=green!40!black,circle,inner sep=.1cm,below right=.5cm] at (a) ;
 draw[double distance=3mm,double=gray] roadpath;
 draw[white,densely dashed] roadpath;
 pgfmathsetmacrofactorn/360
 path[car on road=at pos factor with dist 1mm and color red] roadpath;
 path[car on road=at pos 1-factor with dist -1mm and color blue] roadpath;
 pgfmathsetmacrofactormod(n/360+0.5,1)
 path[car on road=at pos factor with dist 1mm and color cyan] roadpath;
 path[car on road=at pos 1-factor with dist -1mm and color orange] roadpath;
 endtikzpicture

enddocument


enter image description here







share|improve this answer












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answered 3 hours ago









marmot

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  • 1




    +1 for the wrong side of the road :-D
    – egreg
    2 hours ago










  • @egreg Of course, in Italy they drive on the right side. And since in the UK they drive on the opposite side, and since the opposite of right is wrong, there is only one possible conclusion ;-)
    – marmot
    2 hours ago










  • chat.stackexchange.com/transcript/message/30630373#30630373
    – egreg
    2 hours ago












  • 1




    +1 for the wrong side of the road :-D
    – egreg
    2 hours ago










  • @egreg Of course, in Italy they drive on the right side. And since in the UK they drive on the opposite side, and since the opposite of right is wrong, there is only one possible conclusion ;-)
    – marmot
    2 hours ago










  • chat.stackexchange.com/transcript/message/30630373#30630373
    – egreg
    2 hours ago







1




1




+1 for the wrong side of the road :-D
– egreg
2 hours ago




+1 for the wrong side of the road :-D
– egreg
2 hours ago












@egreg Of course, in Italy they drive on the right side. And since in the UK they drive on the opposite side, and since the opposite of right is wrong, there is only one possible conclusion ;-)
– marmot
2 hours ago




@egreg Of course, in Italy they drive on the right side. And since in the UK they drive on the opposite side, and since the opposite of right is wrong, there is only one possible conclusion ;-)
– marmot
2 hours ago












chat.stackexchange.com/transcript/message/30630373#30630373
– egreg
2 hours ago




chat.stackexchange.com/transcript/message/30630373#30630373
– egreg
2 hours ago

















 

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