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Smart Traffic Guidance System Disclosure Number: IPCOM000237302D
Publication Date: 2014-Jun-12

Publishing Venue

The Prior Art Database


Nowadays, traffic becomes more and more important in our life, especially for the subway which has been the first choice for traveling. When taking the subway, it is hard to choose a carriage, where there are less passengers, for more convenient travel. This will become more serious in the rush hour. Our disclosure provides a way to show the crowding level of each carriage to the passengers waiting for the train. With the information, passengers can choose the less crowded carriage to get on, thereby it will improve the passengers satisfaction and also the efficiency of the subway.

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Smart Traffic Guidance System

1. Overview

STGS is consisted of the Detection Unit, Data Transport Unit, Central Process Unit and Display Unit. The layout of STGS is as Figure 1. STGS Layout.

Figure 1. STGS Layout

Each carriage is divided into several small areas, named detection area, based on which, STGS does the detection, passengers density conclusion and the passengers distribution display.

The Detection Unit is deployed in all the carriages of the subway train and designed to detect the actual passengers number and distribution in the carriage. This unit could detect the available seats number and the passengers number of all the detection areas in the carriage. Then the data collected by the Detection Unit is transferred to the Data Transport Unit.


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The Data Transport Unit is deployed in the subway train. Each subway train only has one Data TransportUnit. This unit is designed to organize the data from all the Detection Units and send the data to the Central Process Unit in terms of the carriage.

The Central Process Unit is deployed in the subway station and designed to calculate the density distribution of all the carriages. This unit could conclude the passengers density and the potential available seats number of each detection area in the next station which includes 2 factors: the actual passengers number in the carriages before the next station, and the prediction of the passengers to get off in the next station. The conclusion is sent to the Display Unit.

The Display Unit is deployed in the subway station and designed to generate a figure to show the passengers density for each detection area according to the the conclusion of the Central Process Unit.

2. Detection.

The STGS can get an accurate density of passengers in the carriages by:
- Detecting the actual number of getting on passengers
- Forecasting the number of passengers who will get off on the next station.

1) Detection Unit.

All the RFID detecting devices in the carriage and the gravity sensors on the seats consist the detection unit. Each detecting device is associated with one certain carriage.

Each gravity sensor is associated with the once certain seats.

The deployment of the RFID devices should follow the rules:
- There are overlaps of detection area between each 2 RFID devices in order to get a better detecting coverage.

For the deployment layout please refer to Figure 6.

2) Data structure.

The STGS uses several data structures to describe the information in the system. Struct reader_info{ int area;

char carriage_index;

int seat;

int p_num;


   This is the RFID detection device, e.g. the RFID reader's data structure. Each structure corresponds to one certain detection device.
• The
area field stands for the area which the RFID reader covers.

• The carriage_index stands for the carriage where the RFID reader locates.

• The seat stands for the number of occupied seat.

• The p_num stands for the actual number of the passengers.

The are...