CTMSIM - an interactive freeway traffic macrosimulator: get_critical_densities(celldata) - File Exchange

Code covered by the BSD License

Highlights from
CTMSIM - an interactive freeway traffic macrosimulator

aboutGUI(varargin) ABOUTGUI M-file for aboutGUI.fig
ctmGUI(varargin) CTMGUI M-file for ctmGUI.fig
ctrlGUI(varargin) CTRLGUI M-file for ctrlGUI.fig
dfltGUI(varargin) DFLTGUI M-file for dfltGUI.fig
fdGUI(varargin) FDGUI M-file for fdGUI.fig
frpGUI(varargin) FRPGUI M-file for frpGUI.fig
fwcfgGUI(varargin) FWCFGGUI M-file for fwcfgGUI.fig
fwcfgGUI(varargin) FWCFGGUI M-file for fwcfgGUI.fig
iofpGUI(varargin) IOFPGUI M-file for iofpGUI.fig
orpGUI(varargin) ORPGUI M-file for orpGUI.fig
prmGUI(varargin) PRMGUI M-file for prmGUI.fig
rdGUI(varargin) RDGUI M-file for rdGUI.fig
save_dialog(varargin) save_dialog Application M-file for save_dialog.fig
aboutGUIclose() ABOUTGUICLOSE - closes 'About' window.
adjust_cell_struct(celldata) ADJUST_CELL_STRUCT - put fields of cell structure in right order.
adjust_fr_flows(densities, fr... ADJUST_FR_FLOWS - adjust off-ramp flow values using off-ramp flow coefficients
adjust_fr_split_ratios(betas,... ADJUST_FR_SPLIT_RATIOS - multiplies spit ratio by off-ramp flow coefficient.
adjust_or_data(demands, orflo... ADJUST_OR_DATA - adjust on-ramp flow and queue values according to
adjust_or_demands(demands, ce... ADJUST_OR_DEMANDS - multiplies demand by on-ramp demand coefficient.
adjust_or_flow_limits(densiti... ADJUST_OR_FLOW_LIMITS - set maximum possible values for on-ramp flows.
adjust_or_flows(densities, or... ADJUST_OR_FLOWS - make sure on-ramp flows do not exceed allowed limits.
assign_pm(celldata, pmstart, ... ASSIGN_PM - assign post miles to cells.
auto_control(densities, ordat... AUTO_CONTROL - invoke on-ramp flow controllers.
auto_fr_split_ratios(celldata... AUTO_FR_SPLIT_RATIOS - update the array of cell data structures with automatically
auto_or_flows(celldata) AUTO_OR_FLOWS - update the array of cell data structures with automatically
compute_densities(densities, ... COMPUTE_DENSITIES - implementation of conservation equation.
compute_densities_2(densities... COMPUTE_DENSITIES_2 - implementation of conservation equation.
compute_flows(densities, cell... COMPUTE_FLOWS - computes and returns flows based on densities,
compute_flows_2(densities, fr... COMPUTE_FLOWS_2 - computes and returns flows based on densities,
compute_fr_flows(densities, f... COMPUTE_FR_FLOWS - compute off-ramp flow values from the vector of flows
compute_fr_split_ratios(densi... COMPUTE_FR_SPLIT_RATIOS - compute off-ramp split ratios from the vector of flows
compute_prodloss(densities, f... COMPUTE_PRODLOSS - computes and returns Productivity Loss based on densities,
compute_speeds(densities, flo... COMPUTE_SPEEDS - compute speeds from densities and flows.
compute_speeds_2(densities, f... COMPUTE_SPEEDS_2 - compute speeds from densities and flows.
compute_traveltime(speeds, ce... COMPUTE_TRAVELTIME - computes and returns individual travel time (in minutes)
compute_vht(densities, orqueu... COMPUTE_VHT - computes and returns Vehicle Hours Traveled (VHT) based on densities
compute_vmt(densities, speeds... COMPUTE_VMT - computes and returns Vehicle Miles Traveled (VMT) based on densities
controller_alinea(densities, ... CONTROLLER_ALINEA - implementation of ALINEA controller.
controller_cp(densities, flow... CONTROLLER_CP - implementation of 'Proportional in Congestion' controller.
controller_irm(densities, flo... CONTROLLER_IRm - implementation of "Ideal" Ramp Metering strategy.
controller_lqi(densities, flo... CONTROLLER_LQI - implementation of LQI controller.
controller_mirm(densities, fl... CONTROLLER_MIRM - implementation of Modified "Ideal" Ramp Metering strategy,
controller_q_override(demands... CONTROLLER_Q_OVERRIDE - implementation of Queue Override Queue Controller.
controller_q_proportional(dem... CONTROLLER_Q_PROPORTIONAL - implementation of Proportional Queue Controller.
controller_swarm(densities, f... CONTROLLER_SWARM - combination of SWARM1 and SWARM2B controllers,
controller_swarm1(densities, ... CONTROLLER_SWARM1 - implementation of SWARM 1 ramp metering strategy.
controller_swarm2b(densities,... CONTROLLER_SWARM2B - implementation of SWARM 2B ramp metering strategy with
ctmBATCH() CTMBATCH - equivalent of CTMGUI for batch mode, called from CTMSIM.
ctmGUIclose() CTMGUICLOSE - performs cleanup and closes 'ctmGUI' window;
ctmsim(cfg_file, btch) CTMSIM - starts CTM simulation application.
ctrlGUIclose() CTRLGUICLOSE - saves data if necessary, performs cleanup and closes 'ctrlGUI' window;
dfltGUIclose() DFLTGUICLOSE - saves data if necessary, performs cleanup and closes 'dfltGUI' window;
fdGUIclose() FDGUICLOSE - saves data if necessary, performs cleanup and closes 'fdGUI' window;
frpGUIclose() FRPGUICLOSE - saves data if necessary, performs cleanup and closes 'frpGUI' window;
fwcfgGUIclose() FRPGUICLOSE - saves data if necessary, performs cleanup and closes 'fwcfgGUI' window;
fwconfig(cfg_file) FWCONFIG - freeway configuration editor for ACTM.
get_cell_lengths(celldata) GET_CELL_LENGTHS - extract cell lengths from the array
get_cell_list(celldata) GET_CELL_LIST - populate text buffer with cell names.
get_color_grade(densities, fl... GET_COLOR_GRADE - returns array of colors that corresponds to the array of
get_controller_periods(cellda... GET_CONTROLLER_PERIODS - for every on-ramp controller obtain the number
get_critical_densities(cellda... GET_CRITICAL_DENSITIES - extract critical density values from the array
get_cw_speeds(celldata) GET_CW_SPEEDS - extract congestion wave speeds from the array
get_ff_speeds(celldata) GET_FF_SPEEDS - extract free-flow speeds from the array
get_fr_splitratios(celldata) GET_FR_SPLITRATIOS - extract off-ramp split ratio values from the array
get_jam_densities(celldata) GET_JAM_DENSITIES - extract jam density values from the array
get_max_df(celldata) GET_MAX_DF - find maximum possible values for density and flow on the whole
get_max_flows(celldata) GET_MAX_FLOWS - extract maximum flow values from the array
get_mlc_default(cid) GET_MLC_DEFAULT - for the specified on-ramp main line controller,
get_or_flows(celldata) GET_OR_FLOWS - extract on-ramp flow values from the array
get_or_fmax(celldata) GET_OR_FLOWS - extract on-ramp maximum flow values from the array
get_pm_data(celldata) % GET_PM_DATA - returns the array of post miles extracted from the array of
get_qc_default(cid) GET_QC_DEFAULT - for the specified on-ramp queue controller,
get_ramp_lists(celldata) GET_RAMP_LISTS - populate to text buffers with on-ramp and off-ramp names.
get_rbflow(density, orflow, f... GET_RBFLOW - compute flow leaving given freeway cell.
get_rbflow_2(density, orflow,... GET_RBFLOW_2 - compute flow leaving given freeway cell using off-ramp flow.
install(root)
iofpGUIclose() IOFPGUICLOSE - saves data if necessary, performs cleanup and closes 'iofpGUI' window;
mydare(A, B, Q, varargin) MYDARE - solve discrete-time algebraic Riccati equation.
ormlc_menu_action(handles) ORMLC_MENU_ACTION - controller parameter name/value display in ctrlGUI.
orpGUIclose() ORPGUICLOSE - saves data if necessary, performs cleanup and closes 'orpGUI' window;
orqc_menu_action(handles) ORQC_MENU_ACTION - queue controller parameter name/value display in ctrlGUI.
plot_compare(pems, sim, ts) PLOT_COMPARE - plots aggregate data - VHT, VMT, DELAY - comparing PEMS
plot_data_0(handles) PLOT_DATA_0 - clears flow and density (or speed) plots in the main screen
plot_data_1(handles) PLOT_DATA_1 - plots flow and density (or speed) data in the main screen
plot_data_10(handles) PLOT_DATA_10 - clears on-ramp flow and queue plots in the main screen
plot_data_11(handles, demands... PLOT_DATA_11 - plots on-ramp flow and queue data in the main screen
plot_data_20(handles) PLOT_DATA_20 - clears off-ramp flow and split ratio plots in the main screen
plot_data_21(handles) PLOT_DATA_21 - plots off-ramp flow and split ratio data in the main screen
plot_data_30(handles) PLOT_DATA_30 - clears VHT and VMT plots in the main screen of ctmGUI.
plot_data_31(handles) PLOT_DATA_31 - plots VHT and VMT data in the main screen of ctmGUI.
plot_data_T(handles) PLOT_DATA_T - plots correct data in the Travel Time axes: Trvel Time,
plot_freeway(celldata) PLOT_FREEWAY - plot freeway configuration using data in cell structure array.
plot_fwcell(cell) PLOT_FREEWAY - plot freeway cell using data in the cell structure.
plot_fwselect(celldata, idx, ... PLOT_FWSELECT - plot selected freeway cell.
plotbar(X, Y, C)
plotfd(celldata, idx) PLOTFD - plot fundamental diagram for given freeway cell.
plotsim(fname, qntity, cells,... PLOTSIM - plot specified simulation results coming from CTMSIM.
plotsim3(fname, qntity, cells... PLOTSIM3 - plot specified simulation results coming from CTMSIM in 3D.
prmGUIclose() PRMGUICLOSE - saves data if necessary, performs cleanup and closes 'prmGUI' window;
rdGUIclose() RDGUICLOSE - saves data if necessary, performs cleanup and closes 'rdGUI' window;
save_config(cfg_struct, fname... SAVE_CONFIG - save configuration.
save_controllers(mycd, cfgf) SAVE_CONTROLLERS - saves the controller data in the 'celldata' variable
save_fd(mycd, cfgf) SAVE_FD - saves the fundamental diagram data in the 'celldata' variable
save_frparams(mycd, cfgf) SAVE_FRPARAMS - saves the off-ramp parameters in the 'celldata' variable
save_orparams(mycd, cfgf) SAVE_ORPARAMS - saves the on-ramp parameters in the 'celldata' variable
save_rd(mycd, ifl, ofl, cfgf) SAVE_RD - saves the ramp data in the 'celldata' variable
set_densities(den, fn) % SET_DENSITIES - set initial densities in the ctmsim configuration file.
set_fr_split_ratios(celldata,... SET_FR_SPLIT_RATIOS - set off-ramp split ratio values to the array of freeway
set_or_flows(celldata, flows) SET_OR_FLOWS - set on-ramp flow values to the array of freeway
simulation_step(celldata, ... SIMULATION_STEP - computes CTM values (densities; mainline, offramp flows;
simulation_step_2(celldata, .... SIMULATION_STEP_2 - computes CTM values (densities; mainline flows;
contents.m
View all files

from CTMSIM - an interactive freeway traffic macrosimulator by Alex Kurzhanskiy
Freeway traffic simulation based on Asymmetric Cell Transmission Model

get_critical_densities(celldata)

function dc = get_critical_densities(celldata)
% GET_CRITICAL_DENSITIES - extract critical density values from the array
%                          of freeway cell data structures.
%
% Call:   dc = get_critical_densities(celldata)
%
% Parameter:   celldata - array of freeway cell data structures.
%
% Returns:   dc - vector of critical densities.
%
% Last modified:   07/30/2006.

%
% Alex Kurzhanskiy   <akurzhan@eecs.berkeley.edu>
%

N  = size(celldata, 2);  % number of cells

dc = [];

for i = 1:N
  dc = [dc; celldata(i).FDrhocrit];
end

return;

Highlights from CTMSIM - an interactive freeway traffic macrosimulator

Highlights from
CTMSIM - an interactive freeway traffic macrosimulator