the main research relationship of traffic safety is（ ）.
the following is not classified according to the traffic accident of the responsible party.（ ）
the traffic system is in a safe state and avoids accidents.（ ）
the traffic system is in a dangerous state and does not necessarily have an accident.（ ）
traffic accidents contain seven key elements, namely: vehicles, on the road, in the movement, the occurrence of a situation, violations, negligence, and consequences.（ ）
what is the research purpose of road traffic safety？
what is the definition of traffic accident？
（ ）is the most important way for drivers to obtain information.
traffic behaviors that are not likely to cause traffic accidents include（ ）.
vision includes（ ）.
eyesight is generally ided into static sight and dynamic sight.（ ）
the tunnel entrance is more prone to traffic accidents.（ ）
dark adaptation requires longer time than bright adaptation.（ ）
the methods of traffic information collection are（ ）.
collect information about which traffic flow features.（ ）
the following are passive safety measures.（ ）
the following are active safety measures.（ ）
the vehicle handling stability includes two related indicators of handling and stability.（ ）
the vehicle braking performance refers to the performance of the vehicle's ability to stop in a short distance and maintain the stability of the driving direction and a certain speed when driving downhill.
longitudinal slope has two characteristic indexes, namely ( ) and ( ).
the specified number of highway lanes is ( ) and ( ) respectively.
driving safety increases with the number of lanes, that is, the more lanes, the safer driving.( )
the barrier free ramp can not be set at the edge stone of pedestrian road.( )
the wider the road, the higher the safety factor.( )
there are four types of cross section: single width road, double width road, three width road and four width road. ( )
the isolation methods of motor vehicles and non motor vehicles are organic non separation belts, machine non separation guardrails, etc.( )
what are the types and meanings of traffic lights？
what are the design steps for improving traffic safety at intersections？
the following factors are not the most obvious factors affecting the driving safety of road surface: ( )
the number of junction points at a cross is ( ).
greening has ( ) and other safety functions.
the traffic environment includes soft environment and hard environment.( )
the first procedure of accident handling procedure is ( ).
the following are not characteristics of traffic accident scene ( ).
the methods of field investigation are ( ).
what are the ysis methods of road collision position? ( )
at present, the urban public security department is responsible for reporting traffic accidents in china.( )
there are ( ) conflict points at the intersection.
which of the following characteristics does the traffic conflict have? ( )
what are the methods of traffic accident classification and statistics? ( )
in the current traffic accident statistics methods in china, what are the time statistics methods? ( )
a traffic conflict is equivalent to a traffic accident.( )
statistical ysis methods of traffic accidents include statistical table method and statistical chart method.( )
what are the traffic safety evaluation indicators?
what is the definition of traffic conflict？
which of the following characteristics does the traffic conflict have ( )?
the evaluation indexes of road traffic safety include ( ).
what is the form of traffic accident classification and statistics? ( )
the absolute evaluation indexes of road traffic safety include ( ).
the methods of traffic accident prediction can be ided into qualitative prediction and quantitative prediction.( )
the following are not classified as traffic accidents ( ).
the benefit ysis of road traffic safety audit mainly includes ( ).
the following are not part of the emergency rescue system ( ).
the following are the ways of road traffic safety publicity and education ( ).
the prediction content of road traffic development mainly includes ( ).
the form of road traffic safety education includes ( ).
the time limit of road traffic safety planning should not be too long, generally 2-5 years is the most appropriate. ( )
the prediction of social and economic development mainly includes population, economy, industrial structure, transportation structure, etc.( )
what is the content of road traffic safety design？
what is the meaning of traffic accident rescue？
the road traffic safety law of the people's republic of china is to maintain road traffic order, ( ) and improve traffic efficiency.
when the motor vehicle is driving on the road with the maximum speed limit sign ( ).
the following are not road traffic signals ( ).
motor vehicles on roads without traffic signs and markings shall ( ).
what is the driver's field of vision?
the relationship between speed and driver's response time?
what are the passive safety technologies of automobile?
what are the forms that should be avoided in the combination of horizontal curve and vertical curve?
what is the definition of traffic accident and what are its characteristics?
what are the functions of road traffic safety regulations?