globals [ selected-car ;; the currently selected car ] turtles-own [ speed ;; the current speed of the car speed-limit ;; the maximum speed of the car (different for all cars) lane ;; the current lane of the car target-lane ;; the desired lane of the car park-time ;; the driver's current patience park ;; the driver's probability to be searching for a parking space park? ;; true if the car wants to park parked? ;; true if the car is parked leaving? ;; true if the car is leaving just-parked? ;; true if the car has recently parked just-count ;; time to park ] to setup clear-all draw-road set-default-shape turtles "car" crt number [ setup-cars ] crt 20 [ setup-parked ] reset-ticks end to draw-road ask patches [ set pcolor green if ((pycor > -1) and (pycor < 2)) [ set pcolor gray ] if ((pycor = 1) and ((pxcor mod 5) = 0)) and (pxcor != -60) and (pxcor != 60) [ set pcolor yellow ] if ((pycor = 2) or (pycor = -1) or (((pxcor = -1) or (pxcor = 1)) and (pycor < -1))) [ set pcolor black ] if ((pycor = 2) or (pycor = -1)) [ set pcolor black ] if ((pxcor = 0) and (pycor < 0)) [ set pcolor gray ] ] end to setup-parked set color blue set park? false set park 1000 set parked? true setxy (random 120) 1 set heading 90 separate-parked set heading 180 set park-time 1 + random parking-time set speed-limit 1 set just-parked? false end to separate-parked if any? other turtles-here [ fd 1 separate-parked] if (pcolor != yellow) [ fd 1 separate-parked] end to setup-cars set color black setxy random-xcor 0 set heading 90 ifelse (gb-park = true) [set park random 1000] [set park 1000] ifelse (park > park-ratio * 10) [set park? false set speed 0.1 + random-float .9 set speed-limit 1 set park-time 0 ] [set park? true set park-time 1 + random parking-time set speed 0.1 + random-float ((park-drive-speed - 10 ) / 100) ;; cars that are looking for a parking space are slower set speed-limit park-drive-speed / 100 set color red ] set just-parked? false set parked? false ;; make sure no two cars are on the same patch separate-cars end to separate-cars ;; turtle procedure if any? other turtles-here [ fd 1 separate-cars ] end ;; All turtles look first to see if there is a turtle directly in front of it, ;; if so, set own speed to front turtle's speed and decelerate. Otherwise, if ;; look-ahead is set for 2, look ahead one more patch and do the same. If no front ;; turtles are found, accelerate towards speed-limit to drive ;; first determine average speed of the cars ask turtles [ ifelse (parked? = true) [leave-parkspace] [ ifelse ([pcolor] of (patch-at 0 1) = yellow) and (not any? turtles-at 0 1) and (park? = true) [park-car] [ ifelse ([pcolor] of (patch-at 1 0) = red) [set speed 0] [ ifelse (any? turtles-at 1 0) [ set speed ([speed] of (one-of (turtles-at 1 0))) decelerate ] [ ifelse (look-ahead = 2) [ ifelse (any? turtles-at 2 0) [ set speed ([speed] of (one-of turtles-at 2 0)) decelerate ] [accelerate] ] [accelerate] ] if (speed < 0.01) [ set speed 0.01 ] if (speed > speed-limit) [ set speed speed-limit ] ;; Control for making sure no one crashes. if ((xcor + speed > 60) or ((xcor + speed > 0) and (xcor + speed < 1.1))) and (leaving? = true) [setup-newcars] ifelse (any? turtles-at 1 0) and (xcor != min-pxcor - .5) [ set speed [speed] of (one-of turtles-at 1 0) ] [ ifelse ((any? turtles-at 2 0) and (speed > 1.0)) [ set speed ([speed] of (one-of turtles-at 2 0)) fd 1 ] [jump speed] ] ] ] ] ] tick end to setup-newcars set color black ifelse (gb-park = true) [set park random 1000] [set park 1000] ifelse (park > park-ratio * 10) [set park? false set leaving? true set speed 0.1 + random-float .9 set speed-limit 1 set park-time 0 ] [set park? true set leaving? false set park-time 1 + random parking-time set speed 0.1 + random-float ((park-drive-speed - 10 ) / 100) ;; cars that are looking for a parking space are slower set speed-limit park-drive-speed / 100 set color red ] set parked? false ;; make sure no two cars are on the same patch separate-cars end to park-car ask patch-at 0 0 [set pcolor red] set heading 0 fd 1 set heading 180 set leaving? false set park? false set parked? true set color blue set just-parked? true set just-count time-to-park end to leave-parkspace ifelse (just-parked? = true) [ ifelse (just-count > 0) [set just-count just-count - 1] [ask patch-at 0 -1 [set pcolor gray] set just-parked? false set just-count time-to-park ] ] [ ifelse (park-time > just-count) [set park-time park-time - 1] [ ifelse (any? turtles-at 0 1) or (park-time > 0) [ask patch-at 0 -1 [set pcolor red] set park-time park-time - 1 ] [ fd 1 ask patch-at 0 0 [set pcolor gray] set heading 90 set leaving? true set park? false set parked? false set color black set speed 0.1 + random-float .9 set speed-limit 1 set park-time 0 ] ] ] end ;; increase speed of cars to accelerate ;; turtle procedure set speed (speed + (speed-up / 1000)) end ;; reduce speed of cars to decelerate ;; turtle procedure set speed (speed - (slow-down / 1000)) end @#$#@#$#@ GRAPHICS-WINDOW 10 50 988 249 60 10 8.0 1 10 1 1 1 0 1 0 1 -60 60 -10 10 1 1 1 ticks 30.0 BUTTON 10 300 115 333 NIL setup NIL 1 T OBSERVER NIL NIL NIL NIL 1 BUTTON 12 385 117 418 go drive T 1 T OBSERVER NIL NIL NIL NIL 1 BUTTON 11 341 116 374 go once drive NIL 1 T OBSERVER NIL NIL NIL NIL 1 MONITOR 620 480 734 525 average speed mean [speed] of turtles 2 1 11 SLIDER 165 295 355 328 number number 0 120 60 1 1 NIL HORIZONTAL SLIDER 165 415 355 448 slow-down slow-down 0 100 50 1 1 NIL HORIZONTAL SLIDER 385 340 560 373 park-ratio park-ratio 0 100 40 1 1 % HORIZONTAL SLIDER 165 335 355 368 look-ahead look-ahead 1 2 1 1 1 NIL HORIZONTAL PLOT 620 290 986 466 Car Speeds Time Speed 0.0 300.0 0.0 2.5 true true "set-plot-y-range 0 ((max [speed-limit] of turtles) + .5)" "" PENS "average" 1.0 0 -10899396 true "" "plot mean [speed] of turtles" "max" 1.0 0 -11221820 true "" "plot max [speed] of turtles" "min" 1.0 0 -13345367 true "" "plot min [speed] of turtles" SLIDER 165 375 355 408 speed-up speed-up 0 100 50 1 1 NIL HORIZONTAL SWITCH 385 295 555 328 gb-park gb-park 0 1 -1000 SLIDER 385 385 560 418 park-drive-speed park-drive-speed 10 100 30 1 1 NIL HORIZONTAL SLIDER 385 430 557 463 parking-time parking-time 0 1000 100 1 1 NIL HORIZONTAL TEXTBOX 385 265 585 290 Parking characteristics 20 0.0 1 TEXTBOX 165 265 355 290 Traffic characteristics 20 0.0 1 TEXTBOX 20 10 170 36 Model 24 0.0 1 TEXTBOX 10 265 160 286 Initialize 20 0.0 1 SLIDER 385 475 557 508 time-to-park time-to-park 0 100 10 1 1 NIL HORIZONTAL @#$#@#$#@ ## WHAT IS IT? This project is a model allowing for cars to use on-street parking. Much like a simpler model of Traffic, this model demonstrates how traffic jams can form, considering different speeds of the cars that are using the street, As in the traffic model, traffic may slow down and jam without any centralized cause. ## HOW TO USE IT Click on the SETUP button to set up the cars. Click on GO to start the cars moving. The GO ONCE button drives the car for just one tick of the clock. The NUMBER slider controls the number of cars on the road. The LOOK-AHEAD slider controls the distance that drivers look ahead (in deciding whether to slow down or change lanes). The SPEED-UP slider controls the rate at which cars accelerate when there are no cars ahead. The SLOW-DOWN slider controls the rate at which cars decelerate when there is a car close ahead. The GB-PARK (global parking) switcher controls whether cars are allowed to park. The PARK-RATIO slider controls the ratio of the cars that are driving through the street that are actually looking for a parking space. The PARK-DRIVE-SPEED slider controls the speed at which cars that are looking for a parking space drive (it controls the maximum speed; the maximum speed of cars that are not looking for a parking space is 100). The PARKING-TIME controls the number of rounds that a car, once parked, stay in the parking space. Finally the TIME-TO-PARK slider controls the number of rounds a car takes to park once it has found a free parking space. You may wish to slow down the model with the speed slider to watch the behavior of certain cars more closely. The AVERAGE-SPEED monitor displays the average speed of all the cars. The CAR SPEEDS plot displays four quantities over time: - the maximum speed of any car - CYAN - the minimum speed of any car - BLUE - the average speed of all cars - GREEN ## RELATED MODELS Traffic Basic @#$#@#$#@ 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 arrow true 0 Polygon -7500403 true true 150 0 0 150 105 150 105 293 195 293 195 150 300 150 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 circle false 0 Circle -7500403 true true 0 0 300 circle 2 false 0 Circle -7500403 true true 0 0 300 Circle -16777216 true false 30 30 240 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 cylinder false 0 Circle -7500403 true true 0 0 300 dot false 0 Circle -7500403 true true 90 90 120 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 line half true 0 Line -7500403 true 150 0 150 150 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 90 240 150 225 180 165 105 Polygon -7500403 true true 105 90 60 150 75 180 135 105 plant false 0 Rectangle -7500403 true true 135 90 165 300 Polygon -7500403 true true 135 255 90 210 45 195 75 255 135 285 Polygon -7500403 true true 165 255 210 210 255 195 225 255 165 285 Polygon -7500403 true true 135 180 90 135 45 120 75 180 135 210 Polygon -7500403 true true 165 180 165 210 225 180 255 120 210 135 Polygon -7500403 true true 135 105 90 60 45 45 75 105 135 135 Polygon -7500403 true true 165 105 165 135 225 105 255 45 210 60 Polygon -7500403 true true 135 90 120 45 150 15 180 45 165 90 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 151 1 185 108 298 108 207 175 242 282 151 216 59 282 94 175 3 108 116 108 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 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 wheel false 0 Circle -7500403 true true 3 3 294 Circle -16777216 true false 30 30 240 Line -7500403 true 150 285 150 15 Line -7500403 true 15 150 285 150 Circle -7500403 true true 120 120 60 Line -7500403 true 216 40 79 269 Line -7500403 true 40 84 269 221 Line -7500403 true 40 216 269 79 Line -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 5.0.5 @#$#@#$#@ setup repeat 50 [ drive ] @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ @#$#@#$#@ default 0.0 -0.2 0 0.0 1.0 0.0 1 1.0 0.0 0.2 0 0.0 1.0 link direction true 0 Line -7500403 true 150 150 90 180 Line -7500403 true 150 150 210 180 @#$#@#$#@ 1 @#$#@#$#@