Developing a Traffic Management Framework for Coastal Expressway Bridges under Adverse Weather Conditions: Case Study of Rain Day in Shenzhen, China

Table 3

Classification of rainfall density and description of the MDWIS in China.

Categories
Color	BLUE	YELLOW	ORANGE	RED
Descriptions	The precipitation within future (Duration) will be up to over (Precipitation Thresholds), or it has already been up to over (Precipitation Thresholds) and may continue.
(Duration)	12 hours	6 hours	3 hours	3 hours
(Precipitation Thresholds)	50 mm	50 mm	50 mm	100 mm
Range of precipitation rate (mm/hr)	4.2~8.3	8.3~16.7	16.7~33.3	33.3~
Capacity reduction on GSCE-SS	5%	10%	15%	20%
Operation speed reduction on GSCE-SS	5%	10%	15%	25%
Traffic flow speed on GSCE-SS^1 (km/hr)	76 (47.5)	72 (45)	68 (42.5)	60 (37.5)

Note.¹The average operation speed on GSCE-SS is assumed to be 80 km/hr on dry, sunny days.