Smart restroom operations across expressway service areas for Guangdong Communications Investment

Project overview

In 2024 Tongwei supplied smart restrooms for several expressway service areas run by Guangdong Communications Investment. Passing traffic rises on holidays, restrooms sit in the service building, and one site alone has more than two hundred stalls, more than the on-site shift can watch. Five service areas use the same pattern. Buried stall sensors detect occupied or free and can interlock flushing and exhaust; LED indicators show occupancy outside. Air sensing covers temperature, humidity, ammonia, hydrogen sulphide and illuminance. Entrance counters use stereo counting for entries and exits, without treating faces as the managed object. Water level and pressure are measured separately, so leaks and pressure faults are not found only in the pump room. Each site has two management hosts, concentrators for relay interlock, and six 43-inch screens at the doors. Guide screens at sites such as Conghua South show free stalls for the men's and women's rooms, with temperature, humidity, ammonia, hydrogen sulfide and footfall. All five join one platform, so headquarters sees occupancy, odour, footfall and water by site, and alarms reach the duty staff without asking along the expressway.

On site

The Conghua South service-area building — Conghua South service area

The stall guide screen by the service-area restroom — Stall guide screen at the door

Service-area stalls, with indicators showing occupied and free — Occupancy indicators outside the stalls

Green free indicators along the top of the stall doors — Indicators outside the stalls

Conghua South men's restroom screen showing free stalls, air and footfall — Conghua South men's room: free stalls and air

Conghua South women's restroom screen showing free stalls, air and footfall — Conghua South women's room: free stalls and air

Main functions delivered

Stall guidance: 220 buried sensors and 220 indicators per site, about 1,100 across five; sensors can interlock flush and exhaust
Air: 6 sensors per site, about 30 across five, for temperature, humidity, ammonia, hydrogen sulphide and illuminance
Footfall: 4 stereo counters per site, about 20 across five, counting entries and exits
Water: 2 level and pressure sets per site, about 10 across five
On-site interlock: 2 hosts and 14 concentrators per site; about 10 hosts and 70 concentrators across five
Door guidance: six 43-inch screens per site, about 30 across five, showing stall status
One headquarters platform: occupancy, odour, footfall and water by service area

Project list

The list is published without prices or contacts.

Guangdong Communications Investment, one service area

Category	Item	Model	Qty	Use
Stall	Infrared squat sensor	TW-HID12	220	Buried in the wall; occupancy, and can interlock flush and exhaust
Indicator	Stall LED indicator	TW-TIL20-485	220	Shows occupancy outside the stall
Environment	Air-quality sensor	TW-WES10-A	6	Temperature, humidity, ammonia, hydrogen sulphide and illuminance
Footfall	Stereo footfall counter	Stereo counting	4	Counts entries and exits
Water	Water level and pressure	Level / pressure	2	Leaks and abnormal pressure
Host	Smart management host	BEC2000	2	Cabinet included; aggregates this site
Interlock	Data concentrator	IOC10-6	14	Relay interlock
Display	Stall status guide screen	43 inch	6	Stall status at the door
Power	Indicator power supply	DC12V	4	Powers the indicators
Distribution	Distribution box	Custom	2	Power distribution on site

Guangdong Communications Investment, five service areas combined

Category	Item	Model	Qty	Use
Stall	Infrared squat sensor	TW-HID12	About 1,100	Five sites to the same pattern
Indicator	Stall LED indicator	TW-TIL20-485	About 1,100	Shows occupancy outside the stall
Environment	Air-quality sensor	TW-WES10-A	About 30	Temperature, humidity, ammonia, hydrogen sulphide and illuminance
Footfall	Stereo footfall counter	Stereo counting	About 20	Counts entries and exits
Water	Water level and pressure	Level / pressure	About 10	Leaks and abnormal pressure
Host	Smart management host	BEC2000	About 10	Two per service area
Interlock	Data concentrator	IOC10-6	About 70	Relay interlock
Display	Stall status guide screen	43 inch	About 30	Stall status at the door
Platform	Smart restroom platform	TW-SmartView	1	Occupancy, odour, footfall and water for five service areas

The problem

Guangdong Communications Investment's service areas sit far apart along the expressway, and holiday traffic arrives at once. One site has many stalls; cleaners learn it is full only at the door. Headquarters needs occupancy, odour, footfall and water across several sites, without posting someone at each.

What we connected

Buried stall sensing, flush and exhaust interlock, indicators outside
Temperature, humidity, ammonia, hydrogen sulphide, illuminance and stereo footfall
Water level and pressure
43-inch stall guide screens and a multi-site platform

What we did

Prove stalls, air, footfall, water and guide screens at one service area, then copy the same list to the others
Hosts stay at the service area; headquarters watches the platform, so guidance and interlock do not depend on calling the site
Five service areas share one platform, alarms route by site, and fewer empty trips are made along the expressway

How it was rolled out

Confirm stall counts, male and female rooms, and power and network in each service building
Finish sensing, indicators, air, footfall, water and guide screens at one service area first
Build the other sites to the same list, then join all five to one platform

Outcome

Drivers see free stalls on the guide screen before walking in, instead of finding a full restroom inside the building
Odour, footfall and water level reach duty staff first, so holidays do not depend only on walking the site
Five Guangdong Communications Investment service areas share one platform for occupancy and water, so headquarters does not ask site by site

If your site is similar

Send the number of service areas, stalls per site, whether male and female rooms are in separate buildings, and whether headquarters should see every site on one platform.

Products involved

Products used

BEC2000 Smart IoT Gateway BEC2000 Environment and Status Sensors Temp-humidity / leak / smoke / gas / water quality SDS / IOC Expansion Modules SDS / IOC AIoT Operations Platform AIoT Data Platform

Related core business

Scene Solution Services Scene Services Smart Restroom Open the scenario

Smart Restroom

Other cases in this scenario

Case studies

Municipal restrooms

Star-rated public restrooms in Tianhe, Guangzhou

Tianhe's restrooms are busy, so odour, wet floors and finding a free stall depend on cleaners watching. Sound-activated lights can go out while a stall is still occupied; missed flushes and unwashed floors mean complaints arrive before detection.

Transport hub

Smart restrooms at Guangzhou Baiyun Airport terminal

Baiyun Airport's terminal traffic is concentrated, so toilet paper and hand soap run out before stalls do. Cleaners refill on a fixed route, remaining stock is invisible, and passenger complaints arrive first.

Scenic area / park

Smart restrooms at Xiezhou Guandi Temple, Yuncheng, Shanxi

Restrooms at Xiezhou Guandi Temple sit along the visitor route, and holiday traffic arrives all at once. Cleaners learn a room is full or smelly only by walking there, and visitors learn there is no free stall only at the door.

Public venue

Smart restrooms at Guangdong Science Center

Traffic through the galleries, cinemas and public areas at Guangdong Science Center is uneven. Study seasons and holidays can reach tens of thousands of visitors in a day, and restrooms sit on several floors. Cleaners learn a room is full or smelly only at the door.

Healthcare

A provincial-capital central hospital (confidential)

At this central hospital, peak-hour stall vacancy is unclear, and cleaners learn a room is busy only at the door. Corridor no-smoking rules depend on patrols, cleaning attendance is unrecorded, and facilities staff need restrooms, smoking alerts and cleaning on one screen.

Next step

If your site is similar

Send the number of service areas, stalls per site, whether male and female rooms are in separate buildings, and whether headquarters should see every site on one platform.

Contact us Back to all cases