globals [ delta_t freq elapsed_time jam-rl jam-lr transition-left-to-right transition-right-to-left number-rl number-lr] breeds [ cars-rl cars-lr train warningSignal-l warningSignal-r barrier-l barrier-r obstacle-l obstacle-r signR signL] cars-lr-own [speed accel? ] cars-rl-own [speed accel? ] ; Note: ; character "l" is used to indicate "left", character "r" is used to indicate "right" ; combination of "lr" is used to indicate "from left to right", combination of "rl" is used to indicate "from right to left" ; Intitiation of the model to initiation ca draw-lanes set jam-rl 0 set jam-lr 0 set elapsed_time 0 set transition-left-to-right 0 set transition-right-to-left 0 set delta_t 0.001 set number-rl 0 set number-lr 0 set-default-shape cars-rl "car r" set-default-shape cars-lr "car l" set-default-shape train "train" create-custom-train No_of_train_units [ set color white setxy -1 * screen-edge-x -6 set heading 90 no-overlay ] set-default-shape warningSignal-l "warning-light" set-default-shape warningSignal-r "warning-light" create-warningSignal-l 1 ask warningSignal-l [set heading 270 setxy 1 2 set color white set size 2] create-warningSignal-r 1 ask warningSignal-r [set heading 90 setxy -3 -2 set color white set size 2] set-default-shape barrier-l "barrier-up" set-default-shape barrier-r "barrier-up" create-barrier-l 1 ask barrier-l [set heading 90 setxy -2 -1 set color white set size 2] create-barrier-r 1 ask barrier-r [set heading 270 setxy 0 1 set color white set size 2] create-obstacle-l 1 ask obstacle-l [setxy -2 -2 set shape "R" set color white set heading 0] create-obstacle-r 2 ask obstacle-r [setxy 0 2 set shape "R" set color white set heading 180] set-default-shape signR "sign" set-default-shape signL "sign" create-custom-signL 1 [setxy -9 -2 set heading 90 ] create-custom-signR 1 [setxy 8 2 set heading -90 ] if not TrafficSignL? [ask signL [set hidden? true]] if not TrafficSignR? [ask signR [set hidden? true]] set freq 0 new-cars end ; Procedure making ganeration of new cars possible to new-cars ifelse ((any? cars-lr-at screen-edge-x 1) or (any? cars-lr-at (screen-edge-x - 1) 1)) [set jam-rl jam-rl + 1] [create-custom-cars-lr 1 [set heading 270 setxy screen-edge-x 1 set speed 0 set color lime set number-rl number-rl + 1]] ifelse ((any? cars-rl-at (0 - screen-edge-x ) -1) or (any? cars-rl-at (1 - screen-edge-x ) -1)) [set jam-lr jam-lr + 1] [create-custom-cars-rl 1 [set heading 90 setxy 0 - screen-edge-x -1 set speed 0 set color red set number-lr number-lr + 1]] end ; Procedure for drawing 2 lanes of the road together with a half-way line to draw-lanes ask patches [ set pcolor green if ( pycor = -6 and pxcor < -1) or ( pxcor = -1 and pycor < 6 and pycor > -7) or ( pycor = 6 and pxcor > -2) [ set pcolor blue ] if (abs pycor <= 1) [ set pcolor black ] if (pycor = 0) [ set plabel "------" ] ; this will draw a half-way line if ( pycor > -2 and pycor < 2 and pxcor = -1) [ set pcolor 97 ] if ( pycor > -5 and pycor <= -2 and pxcor = -1) [ set pcolor 38 ] if ( pycor < 5 and pycor >= 2 and pxcor = -1) [ set pcolor 38 ] ] end ; Procedure for running the model (as repeated step by step procedure) to go go-1-step end ; Procedure for running the model step by step to go-1-step ask train [ fd (Train_speed * delta_t) ] curve level_crossing set elapsed_time elapsed_time + 1 set freq freq + 1 if freq > time_interval [new-cars set freq 0] movement draw-graph ifelse TrafficSignR? [if hidden?-of turtle 3 [ask signR [set hidden? false]]] [if not hidden?-of turtle 3 [ask signR [set hidden? true]]] ifelse TrafficSignL? [if hidden?-of turtle 3 [ask signL [set hidden? false]]] [if not hidden?-of turtle 3 [ask signL [set hidden? true]]] end ; Procedure to realize movement of cars to movement ask cars-lr [ if xcor < 0 - screen-edge-x + 3 [ set transition-right-to-left transition-right-to-left + 1 set number-rl number-rl - 1 die ] set accel? true if (any? cars-lr-at -1 0) ; ensures stopping if a vehicle is already generated at [-1 0] or (any? obstacle-r-at -1 0) ; ensures stopping in front of the right barriers or (any? cars-lr-at -2 0) or (any? obstacle-r-at -2 0) [set speed 0 set accel? false] if (any? cars-lr-at -3 0) or (any? obstacle-r-at -3 0) [set speed 0.01 set accel? false] if accel? [speed-up] if TrafficSignR? and xcor < 8 and xcor > 0 and ycor > 0 [ set speed speed / 3 ] if not hidden?-of turtle 3 [ask signR [set hidden? false] fd speed] ] ask cars-rl [ if xcor > screen-edge-x - 3 [ set transition-left-to-right transition-left-to-right + 1 set number-lr number-lr - 1 die ] set accel? true if (any? cars-rl-at 1 0) or (any? obstacle-l-at 1 0) or (any? cars-rl-at 2 0) or (any? obstacle-l-at 2 0) [set speed 0 set accel? false] if (any? cars-rl-at 3 0) or (any? obstacle-l-at 3 0) [set speed 0.01 set accel? false] if accel? [speed-up] if TrafficSignL? and xcor > -9 and xcor < -2 and ycor < 0 [set speed speed / 3 ] if not hidden?-of turtle 3 [ask signL [set hidden? false] fd speed]] end ; Procedure used to speed up cars to speed-up ifelse (speed >= max_car_speed) [set speed max_car_speed fd speed] [set speed speed + 0.01 fd speed] end ; Procedure used to turn left or turn right (train) to curve ask train [ if (distancexy 0 -6) < 1 [ set heading 0 set shape "vlak sever" ] if (distancexy 0 6) < 1 [ set heading 90 set shape "train" ] if (distancexy screen-edge-x 6) < 1 [ setxy -1 * screen-edge-x -6 ] ] end ; Procedure used to make dependency of level crossing installation on train speed and length to level_crossing if Train_speed <= 40 [ ask train-at -1 -4 [ warning ] ask train-at -1 -3 [ barriers ]] if Train_speed > 40 [ ask train-at -1 -6 [ warning ] ask train-at -1 -4 [ barriers ]] if No_of_train_units = 1 [ ask train-at -1 3 [annulation] ask train-at -1 6 [basic-state]] if No_of_train_units = 2 [ ask train-at -1 4 [annulation] ask train-at 0 6 [basic-state]] if No_of_train_units = 3 [ ask train-at -1 5 [annulation] ask train-at 1 6 [basic-state]] end ; Procedure defining warning signals to warning ask warningSignal-l [set color red] ask warningSignal-r [set color red] end ; Procedure used to create barriers in required shape to barriers ask barrier-l [set heading 0 setxy -3 -1 set color red set size 2] ask barrier-r [set heading 180 setxy 1 1 set color red set size 2] ask obstacle-l [setxy -3 -1 set shape "barrier" set color red] ask obstacle-r [setxy 1 1 set shape "barrier" set color red ] end ; Procedure defining an annulation state of the level crossing installation to annulation ask warningSignal-l [set color black] ask warningSignal-r [set color black] ask barrier-l [set heading 90 setxy -2 -1 set color white set size 2] ask barrier-r [set heading 270 setxy 0 1 set color white set size 2] ask obstacle-l [setxy -2 -2 set shape "R" set color white] ask obstacle-r [setxy 0 2 set shape "R" set color white set heading 180 ] end ; Procedure defining a basic (default) state of the level crossing installation to basic-state ask warningSignal-l [set heading 270 setxy 1 2 set color white set size 2] ask warningSignal-r [set heading 90 setxy -3 -2 set color white set size 2] end ; Procedure used to ensure no overlay of turtles to no-overlay if any? other-turtles-here [ fd 1 no-overlay ] end ; Procedure for drawing graphs to draw-graph set-current-plot "Troughput VS Time" set-current-plot-pen "left-right" plot transition-left-to-right / elapsed_time set-current-plot-pen "right-left" plot transition-right-to-left / elapsed_time end @#$#@#$#@ GRAPHICS-WINDOW 172 16 836 318 20 8 15.95122 1 10 1 1 1 0 1 1 1 CC-WINDOW 5 514 970 609 Command Center 0 BUTTON 13 15 77 48 Setup initiation NIL 1 T OBSERVER T NIL BUTTON 81 15 149 48 Go go T 1 T OBSERVER T NIL SLIDER 12 91 150 124 Time_interval Time_interval 1 60 1 1 1 NIL SLIDER 14 165 151 198 No_of_train_units No_of_train_units 1 3 1 1 1 NIL SLIDER 13 127 150 160 Max_car_speed Max_car_speed 0.05 0.1 0.075 0.0010 1 NIL SLIDER 13 201 152 234 Train_speed Train_speed 0 100 69 1 1 km/h BUTTON 81 50 150 83 Go-step go-1-step NIL 1 T OBSERVER T NIL SWITCH 15 242 129 275 TrafficSignL? TrafficSignL? 0 1 -1000 MONITOR 72 341 160 390 Elapsed time elapsed_time 3 1 PLOT 169 341 429 500 Troughput VS Time elapsed_time throughput 0.0 100.0 0.0 0.05 true false PENS "left-right" 1.0 0 -2674135 true "right-left" 1.0 0 -13840069 true MONITOR 448 342 603 391 Total cars passed (from left) transition-left-to-right 0 1 MONITOR 448 397 602 446 Total cars passed (from right) transition-right-to-left 0 1 MONITOR 610 342 745 391 Car throughput (from left) transition-left-to-right / elapsed_time 4 1 MONITOR 750 397 897 446 Current cars from right number-rl 0 1 MONITOR 749 342 895 391 Current cars from left number-lr 0 1 MONITOR 449 451 602 500 Total cars passed transition-left-to-right + transition-right-to-left 0 1 MONITOR 610 397 745 446 Car throuhput (from right) transition-right-to-left / elapsed_time 4 1 MONITOR 611 451 746 500 Car troughput (transition-left-to-right + transition-right-to-left) / elapsed_time 4 1 MONITOR 751 450 898 499 Total current cars on screen number-rl + number-lr 0 1 SWITCH 14 278 130 311 TrafficSignR? TrafficSignR? 1 1 -1000 TEXTBOX 843 279 961 311 Level Crossing Example\nver.1.1 @#$#@#$#@ WHAT IS IT? ----------- The model shows operation of a level crossing installation. The macro-level pattern emerging from interconnections of micro-level behaviours of agents should ensure such conditions of operation that the longest and slowest road vehicle finding itself at the crossing (i.e. inside the hazardous area) just at the moment of activating warning lights (triggered by detection of an approaching train) is able to leave this area before the barriers are falling down. HOW IT WORKS ------------ The model uses rules commonly accepted at crossings of roads and railway lines and enables to study effects of different conditions on traffic flow. Generating of new road vehicles depends on the set time-interval; each vehicle slows down if another vehicle appears ahead, otherwise it tries to go with a maximum allowed speed. The value of maximum speed allowed in front of the crossing may be reduced by installed traffic sign(s) to 20 km/h (independently for both directions). Time before detection of an approaching train and barriers' falling down depends on speed of the train. HOW TO USE IT ------------- 1. Set up the model for selected positions of control elements (mentioned below) by pushing the "Setup” button. 2. Push the “Go” button (for continuous running) or “Go-step” button (for step by step running ). 3. Observe how selected settings influences the traffic flow. THINGS TO NOTICE ---------------- Complex view at the operation of level crossing installation. Several principles taken over from models referenced below. THINGS TO TRY ------------- a) You may use the next control elements to setup the model: - “Time_interval“ slider (to set a time interval between 2 generated road vehicles); - “Max_car_speed” slider (to set a maximum speed for road vehicles going in both directions); - “Train_speed” slider (to set the maximum speed of the train); - “No_of_train_units” slider (to set a number of vagons /drawn as locomotives/ forming a train, particularly 1, 2 or 3); - “TrafficSignL?“ switch (to create a traffic sign restricting the speed of road vehicles approaching the level crossing from the left side to 20 km/h) - “TrafficSignR?“ switch (to create a traffic sign restricting the speed of road vehicles approaching the level crossing from the right side to 20 km/h) b) The following indication parameters are available to show results of model run: - Total cars passed (for each direction, and totally); - Car throughput (for each direction, and totally); - Current number of cars on the screen; - Plot „Throughput vs time“; - Elapsed time. The model also utilises a variable time period used to close barriers. Its value depends on the current speed of a train approaching the level crossing (simplified to two stages - trains with a the speed <= 40 km/h and trains with the speed > 40 km/h). Cars are generated for each direction (based on testing occupancy/vacancy of edge patches) and killed before reaching an edge of the world. EXTENDING THE MODEL ------------------- Making model more realistic: - try to substutite rectangular representation of railway line with arc; - try to substitute used symbols (barriers, warning ligths,..) with symbols recommended by your national standards; - try to make trains running in both directions; - try to use more precise logic to substitute 2-step compensator of approach time based on train speed; - try to create longer trains (consisting of locomotive + wagons, not only locomotives); - try to add sound to simulate ringing bells in the warning period (is it possible?) NETLOGO FEATURES ---------------- Commonly used features - nothing special. RELATED MODELS -------------- The following references can be used to find other models from a traffic domain: 1. WILENSKY U., NetLogo Traffic Basic model. http://ccl.northwestern.edu/netlogo/models/TrafficBasic. Center for Connected Learning and Computer-Based Modeling, Northwestern University, Evanston, IL, 1997. 2. http://www.cs.northwestern.edu/~ade285/Traffic%20Basicnew2.nlogo 3. WILENSKY U., NetLogo Traffic2 Lanes model. http://ccl.northwestern.edu/netlogo/models/Traffic2Lanes. Center for Connected Learning and Computer-Based Modeling, Northwestern University, Evanston, IL, 1998. 4. http://sps.nus.edu.sg/~marimuth/Lab2/traffic.nlogo 5. http://web.cz3.nus.edu.sg/~chenk/gem2503_3/project/Group7/trafficMode.nlogo 6. WILENSKY U., NetLogo Gridlock model. http://ccl.northwestern.edu/netlogo/models/Gridlock. Center for Connected Learning and Computer-Based Modeling, Northwestern University, Evanston, IL, 2002. 7. WILENSKY U., STROUP, W. NetLogo HubNet Gridlock model. http://ccl.northwestern.edu/netlogo/models/HubNetGridlock. Center for Connected Learning and Computer-Based Modeling, Northwestern University, Evanston, IL, 2002. 8. DRESNER K., STONE, P. Multiagent Traffic Management: A Reservation-Based Intersection Control Mechanism. In Proceedings of the Third International Joint Conference on Autonomous Agents and MultiAgent Systems, p. 530--537, ACM. 2004 http://jmvidal.cse.sc.edu/library/dresner04a.pdf http://www.cs.utexas.edu/users/kdresner/2004iav/ CREDITS AND REFERENCES ---------------------- This model was presented at the 5th International Conference "TRANSPORT SYSTEMS TELEMATICS" organized by the Silesian University of Technology, Faculty of Transport in Katowice-Ustron, Poland, November 3-5, 2005 and published in the scientific journal: JANOTA Ales, RASTOCNY Karol, ZAHRADNIK Jiri: Multi-Agent Approach to Traffic Simulation in NetLogo Environment - Level Crossing Model. Zeszyty Naukowe Politechniky Slazskiej, TRANSPORT z. 59, nr kol. 1691, Gliwice 2005. (pp.181-188) PL ISSN 0209-3324 Available documents: http://fel.utc.sk/~janot/dokumenty/TST05-Janota.pdf - the PDF version of the paper; http://fel.utc.sk/~janot/dokumenty/TST05-Janota-full.pdf - the PDF version of the presentation; http://fel.utc.sk/~janot/dokumenty/LevelCrossing.nlogo - this model. @#$#@#$#@ default true 0 Polygon -7500403 true true 150 5 40 250 150 205 260 250 airplane true 0 Polygon -7500403 true true 150 0 135 15 120 60 120 105 15 165 15 195 120 180 135 240 105 270 120 285 150 270 180 285 210 270 165 240 180 180 285 195 285 165 180 105 180 60 165 15 ar r false 0 Rectangle -7500403 true true 15 60 195 210 Polygon -7500403 true true 300 210 296 150 270 135 240 90 195 90 195 210 Rectangle -1 true false 195 60 195 105 Polygon -1 true false 240 105 255 150 210 150 210 105 Circle -1 true false 225 180 60 Circle -1 true false 45 180 60 Rectangle -1 true false 285 158 297 180 Rectangle -1184463 true false 289 180 298 172 Rectangle -1 true false 14 166 283 173 Line -16777216 false 195 90 195 210 Rectangle -1 true false 45 90 165 150 Rectangle -7500403 true true -1 180 30 195 Circle -7500403 true true 240 195 30 Circle -7500403 true true 60 195 30 arrow true 0 Polygon -7500403 true true 150 0 0 150 105 150 105 293 195 293 195 150 300 150 barrier true 1 Line -2674135 true 46 44 255 253 Line -2674135 true 51 259 245 38 barrier-up true 0 Rectangle -7500403 true true 225 30 240 270 box false 0 Polygon -7500403 true true 150 285 285 225 285 75 150 135 Polygon -7500403 true true 150 135 15 75 150 15 285 75 Polygon -7500403 true true 15 75 15 225 150 285 150 135 Line -16777216 false 150 285 150 135 Line -16777216 false 150 135 15 75 Line -16777216 false 150 135 285 75 bug true 0 Circle -7500403 true true 96 182 108 Circle -7500403 true true 110 127 80 Circle -7500403 true true 110 75 80 Line -7500403 true 150 100 80 30 Line -7500403 true 150 100 220 30 butterfly true 0 Polygon -7500403 true true 150 165 209 199 225 225 225 255 195 270 165 255 150 240 Polygon -7500403 true true 150 165 89 198 75 225 75 255 105 270 135 255 150 240 Polygon -7500403 true true 139 148 100 105 55 90 25 90 10 105 10 135 25 180 40 195 85 194 139 163 Polygon -7500403 true true 162 150 200 105 245 90 275 90 290 105 290 135 275 180 260 195 215 195 162 165 Polygon -16777216 true false 150 255 135 225 120 150 135 120 150 105 165 120 180 150 165 225 Circle -16777216 true false 135 90 30 Line -16777216 false 150 105 195 60 Line -16777216 false 150 105 105 60 car false 0 Polygon -7500403 true true 300 180 279 164 261 144 240 135 226 132 213 106 203 84 185 63 159 50 135 50 75 60 0 150 0 165 0 225 300 225 300 180 Circle -16777216 true false 180 180 90 Circle -16777216 true false 30 180 90 Polygon -16777216 true false 162 80 132 78 134 135 209 135 194 105 189 96 180 89 Circle -7500403 true true 47 195 58 Circle -7500403 true true 195 195 58 car l false 0 Rectangle -7500403 true true 105 120 120 210 Polygon -7500403 true true 0 210 0 150 30 135 45 90 105 90 105 210 Rectangle -7500403 true true 120 60 285 210 Rectangle -1 true false 105 60 105 105 Polygon -1 true false 60 105 45 150 90 150 90 105 Circle -7500403 true true 15 180 60 Circle -7500403 true true 195 180 60 Rectangle -1 true false -12 150 0 173 Rectangle -1184463 true false 2 180 11 172 Line -16777216 false 105 105 105 210 Rectangle -1 true false 150 105 270 150 Rectangle -1 true false 270 180 301 195 Circle -1 true false 30 195 30 Circle -1 true false 210 195 30 Line -16777216 false 105 105 105 210 Line -16777216 false 120 120 120 210 Rectangle -1 true false 15 165 285 165 Polygon -1 true false 0 165 15 165 0 195 car r false 0 Rectangle -7500403 true true 180 120 195 210 Rectangle -7500403 true true 15 60 180 210 Polygon -7500403 true true 300 210 296 150 270 135 240 90 195 90 195 210 Rectangle -1 true false 195 60 195 105 Polygon -1 true false 240 105 255 150 210 150 210 105 Circle -7500403 true true 225 180 60 Circle -7500403 true true 45 180 60 Rectangle -1 true false 285 158 297 180 Rectangle -1184463 true false 289 180 298 172 Rectangle -1 true false 14 166 283 173 Line -16777216 false 195 90 195 210 Rectangle -1 true false 30 105 165 150 Rectangle -7500403 true true -1 180 30 195 Circle -1 true false 240 195 30 Circle -1 true false 60 195 30 Line -16777216 false 180 120 180 210 carl false 0 Polygon -7500403 true true 0 180 21 164 39 144 60 135 74 132 87 106 97 84 115 63 141 50 165 50 225 60 300 150 300 165 300 225 0 225 0 180 Circle -16777216 true false 30 180 90 Circle -16777216 true false 180 180 90 Polygon -16777216 true false 138 80 168 78 166 135 91 135 106 105 111 96 120 89 Circle -7500403 true true 195 195 58 Circle -7500403 true true 47 195 58 circle false 0 Circle -7500403 true true 30 30 240 circle 2 false 0 Circle -7500403 true true 16 16 270 Circle -16777216 true false 46 46 210 cow false 0 Polygon -7500403 true true 200 193 197 249 179 249 177 196 166 187 140 189 93 191 78 179 72 211 49 209 48 181 37 149 25 120 25 89 45 72 103 84 179 75 198 76 252 64 272 81 293 103 285 121 255 121 242 118 224 167 Polygon -7500403 true true 73 210 86 251 62 249 48 208 Polygon -7500403 true true 25 114 16 195 9 204 23 213 25 200 39 123 face happy false 0 Circle -7500403 true true 8 8 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Polygon -16777216 true false 150 255 90 239 62 213 47 191 67 179 90 203 109 218 150 225 192 218 210 203 227 181 251 194 236 217 212 240 face neutral false 0 Circle -7500403 true true 8 7 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Rectangle -16777216 true false 60 195 240 225 face sad false 0 Circle -7500403 true true 8 8 285 Circle -16777216 true false 60 75 60 Circle -16777216 true false 180 75 60 Polygon -16777216 true false 150 168 90 184 62 210 47 232 67 244 90 220 109 205 150 198 192 205 210 220 227 242 251 229 236 206 212 183 fish false 0 Polygon -1 true false 44 131 21 87 15 86 0 120 15 150 0 180 13 214 20 212 45 166 Polygon -1 true false 135 195 119 235 95 218 76 210 46 204 60 165 Polygon -1 true false 75 45 83 77 71 103 86 114 166 78 135 60 Polygon -7500403 true true 30 136 151 77 226 81 280 119 292 146 292 160 287 170 270 195 195 210 151 212 30 166 Circle -16777216 true false 215 106 30 flag false 0 Rectangle -7500403 true true 60 15 75 300 Polygon -7500403 true true 90 150 270 90 90 30 Line -7500403 true 75 135 90 135 Line -7500403 true 75 45 90 45 flower false 0 Polygon -10899396 true false 135 120 165 165 180 210 180 240 150 300 165 300 195 240 195 195 165 135 Circle -7500403 true true 85 132 38 Circle -7500403 true true 130 147 38 Circle -7500403 true true 192 85 38 Circle -7500403 true true 85 40 38 Circle -7500403 true true 177 40 38 Circle -7500403 true true 177 132 38 Circle -7500403 true true 70 85 38 Circle -7500403 true true 130 25 38 Circle -7500403 true true 96 51 108 Circle -16777216 true false 113 68 74 Polygon -10899396 true false 189 233 219 188 249 173 279 188 234 218 Polygon -10899396 true false 180 255 150 210 105 210 75 240 135 240 house false 0 Rectangle -7500403 true true 45 120 255 285 Rectangle -16777216 true false 120 210 180 285 Polygon -7500403 true true 15 120 150 15 285 120 Line -16777216 false 30 120 270 120 leaf false 0 Polygon -7500403 true true 150 210 135 195 120 210 60 210 30 195 60 180 60 165 15 135 30 120 15 105 40 104 45 90 60 90 90 105 105 120 120 120 105 60 120 60 135 30 150 15 165 30 180 60 195 60 180 120 195 120 210 105 240 90 255 90 263 104 285 105 270 120 285 135 240 165 240 180 270 195 240 210 180 210 165 195 Polygon -7500403 true true 135 195 135 240 120 255 105 255 105 285 135 285 165 240 165 195 line true 0 Line -7500403 true 150 0 150 300 pentagon false 0 Polygon -7500403 true true 150 15 15 120 60 285 240 285 285 120 person false 0 Circle -7500403 true true 110 5 80 Polygon -7500403 true true 105 90 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 195 90 Rectangle -7500403 true true 127 79 172 94 Polygon -7500403 true true 195 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true false 134 101 141 110 Rectangle -16777216 true false 129 106 136 115 Rectangle -16777216 true false 120 116 130 133 Rectangle -16777216 true false 130 124 148 133 Rectangle -16777216 true false 158 76 185 133 Rectangle -1 true false 166 85 178 125 Rectangle -16777216 true false 123 111 130 120 Rectangle -16777216 true false 138 96 145 105 square false 0 Rectangle -7500403 true true 30 30 270 270 square 2 false 0 Rectangle -7500403 true true 30 30 270 270 Rectangle -16777216 true false 60 60 240 240 star false 0 Polygon -7500403 true true 60 270 150 0 240 270 15 105 285 105 Polygon -7500403 true true 75 120 105 210 195 210 225 120 150 75 target false 0 Circle -7500403 true true 0 0 300 Circle -16777216 true false 30 30 240 Circle -7500403 true true 60 60 180 Circle -16777216 true false 90 90 120 Circle -7500403 true true 120 120 60 train false 0 Rectangle -7500403 true true 30 105 240 150 Polygon -7500403 true true 240 105 270 30 180 30 210 105 Polygon -7500403 true true 195 180 270 180 300 210 195 210 Circle -7500403 true true 0 165 90 Circle -7500403 true true 240 225 30 Circle -7500403 true true 90 165 90 Circle -7500403 true true 195 225 30 Rectangle -7500403 true true 0 30 105 150 Rectangle -16777216 true false 30 60 75 105 Polygon -7500403 true true 195 180 165 150 240 150 240 180 Rectangle -7500403 true true 135 75 165 105 Rectangle -7500403 true true 225 120 255 150 Rectangle -16777216 true false 30 203 150 218 tree false 0 Circle -7500403 true true 118 3 94 Rectangle -6459832 true false 120 195 180 300 Circle -7500403 true true 65 21 108 Circle -7500403 true true 116 41 127 Circle -7500403 true true 45 90 120 Circle -7500403 true true 104 74 152 triangle false 0 Polygon -7500403 true true 150 30 15 255 285 255 triangle 2 false 0 Polygon -7500403 true true 150 30 15 255 285 255 Polygon -16777216 true false 151 99 225 223 75 224 truck false 0 Rectangle -7500403 true true 4 45 195 187 Polygon -7500403 true true 296 193 296 150 259 134 244 104 208 104 207 194 Rectangle -1 true false 195 60 195 105 Polygon -16777216 true false 238 112 252 141 219 141 218 112 Circle -16777216 true false 234 174 42 Rectangle -7500403 true true 181 185 214 194 Circle -16777216 true false 144 174 42 Circle -16777216 true false 24 174 42 Circle -7500403 false true 24 174 42 Circle -7500403 false true 144 174 42 Circle -7500403 false true 234 174 42 turtle true 0 Polygon -10899396 true false 215 204 240 233 246 254 228 266 215 252 193 210 Polygon -10899396 true false 195 90 225 75 245 75 260 89 269 108 261 124 240 105 225 105 210 105 Polygon -10899396 true false 105 90 75 75 55 75 40 89 31 108 39 124 60 105 75 105 90 105 Polygon -10899396 true false 132 85 134 64 107 51 108 17 150 2 192 18 192 52 169 65 172 87 Polygon -10899396 true false 85 204 60 233 54 254 72 266 85 252 107 210 Polygon -7500403 true true 119 75 179 75 209 101 224 135 220 225 175 261 128 261 81 224 74 135 88 99 vlak sever false 0 Rectangle -7500403 true true 150 270 105 60 Polygon -7500403 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-7500403 true 84 40 221 269 x false 0 Polygon -7500403 true true 270 75 225 30 30 225 75 270 Polygon -7500403 true true 30 75 75 30 270 225 225 270 @#$#@#$#@ NetLogo 3.0.2 @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ @#$#@#$#@