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

Table 5

The schemes grades and disposal programs of the mainline control strategies.

Schemes grades	Disposal programs
General	(1) Release the message “navigate with caution” to drivers on VMS.; (2) The traffic policemen drive to conduct patrol and guidance.; (3) Place a warning mark at the upstream of accident spot, and appoint policemen to dredge the flow.
Severe	(1) Release the message “navigate with caution” to drivers on VMS; staff at toll station spread cards printed with driving tips on adverse weather days.; (2) Once the dispatching command center receives crashes reports, it will dispatch the traffic policemen to dispose of crashes.; (3) The policemen set up a warning zone and place a warning mark at the upstream of accident spot. Accident causes and property damage amount should be recorded and dredge the congested flow.; (4) Reversible lane control strategy can be used to expand the capacity of some direction under extreme conditions.