There is no special right of way for trams and there are intersections with social vehicles. Therefore, signal priority and operation and driving safety are the two major problems faced by trams. Through the tram signal priority system, the advantages of medium traffic volume and efficiency of tram power can be brought into play, but at the same time, the normal traffic of social vehicles in the intersection can not be restricted. According to the nature and regional characteristics of different intersections, measures such as absolute priority, relative priority, extension of green light and shortening of red light shall be reasonably taken to meet the priority of tram traffic.

● advantages of signal priority system scheme:

The priority triggering methods of tram intersections are mainly divided into: magnetic ring, beacon, WiFi, loop line and radar

Our signal priority system is realized by adding radar.

The renderings of the radar scheme are as follows:

Schematic diagram of radar scheme

Green: the train is far away from the area

Red: train approaching area

Radar coverage area - traffic signal light frame radar traffic signal control box

● composition of signal priority system equipment:

1. Two radar detection heads installed on the signal light pole;

2. A radar processor installed in the intersection traffic signal cabinet;

3. Signal processing software installed in radar processor;

4. Connect the cable.

● performance index of detection system:

1. System index of radar target detection:

Detection distance: 200m (500m);

Tram running speed: 0-300km / h;

Reaction time of obstacle detection: < 50ms;

Ranging accuracy: 0.25m;

Speed measurement accuracy: ≤ 1km / h.

2. Technical indexes of detection radar:

Operating frequency: 77GHz;

Working mode: FMCW;

Data frequency: 10Hz;

Operating temperature: - 40 ℃ ~ + 70 ℃;

Working humidity: 0% ~ 100%;

Mechanical impact: 30g;

Vibration: 5 ~ 22h0 25p022-100Hz6. 9Gp；

Working voltage: DC24.