To resolve heavy-duty trucks side over the boxes, scraping the guardrail and other accidents when driving into the entrance of emergency escape ramp, according to studying on lateral stability of the out-of-control heavy-duty trucks and combining with their mechanical properties, this dissertation analyses the wheelpath’s geometric features when the out-of-control heavy-duty trucks rush into the emergency escape ramp from the main road, results a reasonable range to adapt the efflux angle of emergency escape ramp on our mountain expressways, and provides necessary theoretical references for the selection of the efflux angle on mountain roads.

It is necessary to exclude the occurrence of significant waves in the inner water area of the port and at the berthing facilities when designing breakwaters. The article presents the results of the calculations of water movement in the harbor area. The most secure options for the location of the port entrance and its size for a given object were identified. The possibility of using the FLOW – 3D program to select planned and constructive solutions at the stage of the preliminary layout of the port water area is substantiated.

According to traffic operation characteristics and lane changing maneuvers, combining with the export notice signs and considering the worst driving conditions, the gap acceptance theory and kinematics are employed to establish the length of lane change operation between interchanges with probability theory. To operating speed as the premise, the necessary length that drivers change to the inside lane from the nearside lane is analyzed in terms of waiting for the gap acceptance, and the necessary length that drivers change to the nearside lane from the inside lane is also analyzed in terms of running for the gap acceptance, then calculation model of minimum net distance between interchanges on eight-lane expressway is constructed. The recommended value is then put forward.

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