used. Thus, the use of the criterion in (1) – (6) made
it possible to take into account:
the specific character of operating means the
satellite navigation system “GLONASS/GPS”,
with their discreteness and inaccuracy being
taken into account;
the efficiency of each subsystem of the
computer support system for the driver,
depending on the time limits and the nature of
the violations of the rules for the safe operation
of vehicles in the conditions of insufficient
visual information;
the influence of the operation quality of one
subsystem on the results of the other operating
subsystems, with their contribution to the
overall result of the computer support system
for the driver.
As sources of information about the Driver-Car-
Road system, the following types of data are taken
into account: the prior data received as a result of
registration, collection and processing the
information from mobile road laboratories; the
posterior data obtained as a result of exchanging the
information between road users and road
infrastructure elements via wireless communication
channels in the operation of motor vehicles; the
operational data obtained as a result of registration,
collection and processing of the data from sensors and
devices located directly in the vehicle.
The analysed factors influencing the efficiency of
solving the problem of choosing a high-speed mode,
with (1) – (6) being taken into account, proved that to
cope with it a complex information support system is
necessary, including subsystems for collecting and
recording data on the state of road situations,
identifying the surface condition of the roadway, the
choice of optimal values for the Driver-Car-Road
system operational parameters, visualizing and
exchanging the information received between road
users. To solve this problem, an integrated simulation
model is developed as a complex ergatic system
Driver-Car-Road, supplemented with modern
hardware and software means for selecting and
optimizing high-speed modes for vehicles.
As the choice of the trajectory and speed of the car
is significantly influenced by the characteristics of the
roadway, some field studies (Khasanov and Sarajkin,
2016; Khasanov, 2016; Gusarov, 2011; Turenko et
al., 2013) of the quality of roadways of the route
“Orenburg-Isyangulovo” and “Orenburg-Orsk” along
two routes P-314 and P-336 were carried out. 30 % of
road sections are found to be unsatisfactory; 15 % of
the road length have no road signs regulating high-
speed modes for vehicles.
The second variant is characterized by: the
condition of 55 % of road sections is excellent; 10 %
of the road have no road signs regulating high-speed
modes for vehicles; 2 especially dangerous areas are
identified, as they have no any warning information
for road users.
Figure 2 presents a block diagram of a stratified
cellular model for a roadway, as an extended object
in space, with the values of cells (facets) determining
some specific category and level of road safety.
In this case, the road is viewed as an extended
object in the space, the boundaries of which are
digitized by the satellite navigation system
“GLONASS/GPS” with the required degree of
discreteness and accuracy.
The road is represented as a set of roadway
sections, the number of which is k. The section of the
road prototype C
i
with the length l
i
and the width s
i
is
a collection of two-dimensional matrices in the form
of independent layers, the number of which is z.
In each of the 7 layers of C
i
, the information is
kept about the specific form of the transport and
operational condition (TOC) of the roadway: the
longitudinal α and transverse slope β, the flatness r,
wheel tracking ρ, the roughness γ and the adhesion
coefficient φ, the location K
δ
, the area S
δ
and the depth
of potholes h
δ
.
The points x
1
,y
1
– x
j
,y
j
denote the navigation
coordinates of the digitized boundaries of the
roadway; l
11
– l
13
indicate distances between the
navigation coordinates and up to the described the
TOC of the roadway with a specific value of v
ij
; h
11
is
the height of the triangle to the described TOC and
(or) the damage of the roadway.
Each cell from a two-dimensional matrix (layer)
is associated according to its address with certain
values of the TOC of the roadway: α, β, r, ρ, γ, φ, K
δ
,
S
δ
and h
δ
. The values of the cells (facets) of the TOC
of the roadway determine the specific category and
level of road safety. On the totality of the TOC values
of the roadway, the computer support system for the
driver determines the safe high-speed mode V
safe
and
recommends the trajectory TR
rec
for the vehicle.
The input of the choosing (determinating)
subsystem model V
safe
is the set S = {α, β, r, ρ, γ, φ,
K
δ
, S
δ
, h
δ
} of the registered values of the parameters
of the DVRE (driver-vehicle-road-environment)
system, the output of the model is the critical v
cr
and
safe v
safe
speeds of the car to be calculated on the basis
of the mathematical model by I.V.Hodes. In this case,
the computer support system of the driver is
considered as a hardware-software converter of the
parameters S in the speed parameter V
safe
.
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