diff --git a/car/src/main/java/cz/muni/pa165/car/data/model/Car.java b/car/src/main/java/cz/muni/pa165/car/data/model/Car.java
index 1d82c7f881e541db5ef1bbb5e00bbfeb4a5fea16..7dfd4f03993fc8b9b2d8e49f88117613271b874a 100644
--- a/car/src/main/java/cz/muni/pa165/car/data/model/Car.java
+++ b/car/src/main/java/cz/muni/pa165/car/data/model/Car.java
@@ -1,18 +1,7 @@
 package cz.muni.pa165.car.data.model;
 
-import cz.muni.pa165.component.data.model.CarComponent;
-import cz.muni.pa165.driver.data.model.Driver;
-import jakarta.persistence.CascadeType;
-import jakarta.persistence.Entity;
-import jakarta.persistence.FetchType;
-import jakarta.persistence.GeneratedValue;
-import jakarta.persistence.GenerationType;
-import jakarta.persistence.Id;
-import jakarta.persistence.JoinColumn;
-import jakarta.persistence.OneToMany;
-import jakarta.persistence.OneToOne;
-import jakarta.persistence.Table;
-import jakarta.validation.Valid;
+import jakarta.persistence.*;
+
 import java.io.Serializable;
 import java.util.List;
 import lombok.AllArgsConstructor;
@@ -35,17 +24,13 @@ public class Car implements Serializable {
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   private Long id;
 
-  @OneToMany(mappedBy = "id",
-      fetch = FetchType.EAGER)
-  private List<@Valid CarComponent> components;
+  @ElementCollection(targetClass = Long.class, fetch = FetchType.EAGER)
+  private List<Long> components;
 
-  @OneToMany(mappedBy = "id",
-      fetch = FetchType.EAGER)
-  private List<@Valid Driver> drivers;
+  @ElementCollection(targetClass = Long.class, fetch = FetchType.EAGER)
+  private List<Long> drivers;
 
-  @OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
-  @JoinColumn(name = "main_driver_id", referencedColumnName = "id")
-  private Driver mainDriver;
+  private Long mainDriverId;
 
 }
 
diff --git a/car/src/main/java/cz/muni/pa165/car/mapper/CarMapper.java b/car/src/main/java/cz/muni/pa165/car/mapper/CarMapper.java
new file mode 100644
index 0000000000000000000000000000000000000000..44ea6e762f75ad7b8c9d366f46c64dc6441858e8
--- /dev/null
+++ b/car/src/main/java/cz/muni/pa165/car/mapper/CarMapper.java
@@ -0,0 +1,44 @@
+package cz.muni.pa165.car.mapper;
+
+import cz.muni.pa165.car.data.model.Car;
+import cz.muni.pa165.common_library.dtos.CarRequestDto;
+import cz.muni.pa165.common_library.dtos.CarResponseDto;
+
+/**
+ * Class for converting Car object and its Data Transfer Objects.
+ */
+public class CarMapper {
+
+  /**
+   * Converts Dto object to Car object.
+   *
+   * @param carRequestDto Dto object of the car.
+   * @return Car object.
+   */
+  public static Car carDtoConverter(CarRequestDto carRequestDto) {
+
+    return Car.builder()
+        .id(null)
+        .components(carRequestDto.getComponentIds())
+        .drivers(carRequestDto.getDriverIds())
+        .mainDriverId(carRequestDto.getMainDriverId())
+        .build();
+  }
+
+  /**
+   * Converts Car object to its Dto.
+   *
+   * @param car Car object.
+   * @return Dto object.
+   */
+  public static CarResponseDto carConverterToDto(Car car) {
+
+    return CarResponseDto.builder()
+        .id(car.getId())
+        .componentIdsNames(car.getComponents())
+        .driverIdsNames(car.getDrivers())
+        .mainDriverId(car.getMainDriverId())
+        .build();
+  }
+
+}
diff --git a/car/src/main/java/cz/muni/pa165/car/rest/CarController.java b/car/src/main/java/cz/muni/pa165/car/rest/CarController.java
index 443c3f93735242d5463b1e424e3844ee60fa541e..be67e6b110a459cd961524b33e54fa758bd64d2e 100644
--- a/car/src/main/java/cz/muni/pa165/car/rest/CarController.java
+++ b/car/src/main/java/cz/muni/pa165/car/rest/CarController.java
@@ -80,7 +80,7 @@ public class CarController {
    */
   @Operation(summary = "Get all cars")
   @GetMapping(path = "/all", produces = MediaType.APPLICATION_JSON_VALUE)
-  public ResponseEntity<List<CarResponseDto>> getAllSeasons() {
+  public ResponseEntity<List<CarResponseDto>> getAllCars() {
     return ResponseEntity.ok(carService.getAllCars());
   }
 
diff --git a/car/src/main/java/cz/muni/pa165/car/restemplate/DbGetter.java b/car/src/main/java/cz/muni/pa165/car/restemplate/DbGetter.java
new file mode 100644
index 0000000000000000000000000000000000000000..61a43c0bd756c1dee35f2ba555a601233821d26d
--- /dev/null
+++ b/car/src/main/java/cz/muni/pa165/car/restemplate/DbGetter.java
@@ -0,0 +1,46 @@
+package cz.muni.pa165.car.restemplate;
+
+import cz.muni.pa165.component.data.model.CarComponent;
+import cz.muni.pa165.driver.data.model.Driver;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.RestTemplate;
+
+/**
+ * Class for retrieving data from other modules using RestTemplate.
+ */
+@Component
+public class DbGetter {
+
+  @Autowired
+  private static RestTemplate client = new RestTemplate();
+
+  private static final String GET_DRIVER_URL = "http://localhost:8083/driver/get/id=";
+  private static final String GET_COMPONENT_URL = "http://localhost:8084/component?id=";
+
+  /**
+   * Get a driver using RestTemplate client.
+   *
+   * @param id driver id
+   * @return Driver object
+   */
+  public static Driver getDriverFromDb(Long id) {
+    String url = GET_DRIVER_URL + id;
+    ResponseEntity<Driver> response = client.getForEntity(url, Driver.class);
+    return response.getBody();
+  }
+
+  /**
+   * Get a component using RestTemplate client.
+   *
+   * @param id component id
+   * @return Component object
+   */
+  public static CarComponent getComponentFromDb(Long id) {
+    String url = GET_COMPONENT_URL + id;
+    ResponseEntity<CarComponent> response = client.getForEntity(url, CarComponent.class);
+    return response.getBody();
+  }
+
+}
diff --git a/car/src/main/java/cz/muni/pa165/car/service/CarComponentPairService.java b/car/src/main/java/cz/muni/pa165/car/service/CarComponentPairService.java
index 51d12c38bda70f5976115fe70bdc94bb0e6f76af..19e2cdddc5bc605e7d33486faa56ad3b83ac7a41 100644
--- a/car/src/main/java/cz/muni/pa165/car/service/CarComponentPairService.java
+++ b/car/src/main/java/cz/muni/pa165/car/service/CarComponentPairService.java
@@ -1,9 +1,7 @@
 package cz.muni.pa165.car.service;
 
 import cz.muni.pa165.common_library.dtos.CarComponentDto;
-import cz.muni.pa165.common_library.dtos.CarRequestDto;
 import cz.muni.pa165.common_library.dtos.CarResponseDto;
-
 import java.util.List;
 
 /**
diff --git a/car/src/main/java/cz/muni/pa165/car/service/CarComponentPairServiceImpl.java b/car/src/main/java/cz/muni/pa165/car/service/CarComponentPairServiceImpl.java
index bea04b8bed1c15e2da9f7be4591290052b7c0cd0..c55cf3574ec1d5e3420e838e3fd40a639d38a5be 100644
--- a/car/src/main/java/cz/muni/pa165/car/service/CarComponentPairServiceImpl.java
+++ b/car/src/main/java/cz/muni/pa165/car/service/CarComponentPairServiceImpl.java
@@ -1,18 +1,17 @@
 package cz.muni.pa165.car.service;
 
 import cz.muni.pa165.car.data.repository.CarRepository;
+import cz.muni.pa165.car.mapper.CarMapper;
 import cz.muni.pa165.common_library.dtos.CarComponentDto;
-import cz.muni.pa165.common_library.dtos.CarRequestDto;
 import cz.muni.pa165.common_library.dtos.CarResponseDto;
 import cz.muni.pa165.common_library.exception.DatabaseException;
 import cz.muni.pa165.component.data.model.CarComponent;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
-import org.springframework.web.client.RestTemplate;
+
+import static cz.muni.pa165.car.restemplate.DbGetter.getComponentFromDb;
 
 /**
  * Service for manipulation with car's components.
@@ -20,9 +19,6 @@ import org.springframework.web.client.RestTemplate;
 @Service
 public class CarComponentPairServiceImpl implements CarComponentPairService {
 
-  @Autowired
-  private static RestTemplate client = new RestTemplate();
-  private static final String GET_COMPONENT_URL = "http://localhost:8084/component?id=";
   CarRepository carRepository;
 
   /**
@@ -38,27 +34,26 @@ public class CarComponentPairServiceImpl implements CarComponentPairService {
   public CarResponseDto addComponent(Long componentId, Long carId) {
     var car = carRepository.findById(carId).orElseThrow(
         () -> new DatabaseException("Car not found"));
-    var component = getComponentById(componentId);
     var components = car.getComponents();
-    components.add(component);
+    components.add(componentId);
     car.setComponents(components);
     carRepository.save(car);
-    return CarServiceImpl.carConverterToDto(car);
+    return CarMapper.carConverterToDto(car);
   }
 
   @Override
   public CarResponseDto removeComponent(Long componentId, Long carId) {
     var car = carRepository.findById(carId).orElseThrow(
         () -> new DatabaseException("Car not found"));
-    var components = new ArrayList<CarComponent>();
-    for (CarComponent d : car.getComponents()) {
-      if (!Objects.equals(d.getId(), componentId)) {
-        components.add(d);
+    var components = new ArrayList<Long>();
+    for (Long id : car.getComponents()) {
+      if (!Objects.equals(id, componentId)) {
+        components.add(id);
       }
     }
     car.setComponents(components);
     carRepository.save(car);
-    return CarServiceImpl.carConverterToDto(car);
+    return CarMapper.carConverterToDto(car);
   }
 
   @Override
@@ -66,30 +61,19 @@ public class CarComponentPairServiceImpl implements CarComponentPairService {
     var car = carRepository.findById(carId).orElseThrow(
         () -> new DatabaseException("Car not found"));
     var componentDtos = new ArrayList<CarComponentDto>();
-    for (CarComponent c : car.getComponents()) {
+    for (Long id : car.getComponents()) {
+      CarComponent carComponent = getComponentFromDb(id);
       componentDtos.add(
           new CarComponentDto(
-              c.getId(),
-              c.getWeight(),
-              c.getPrice(),
-              c.getManufacturer(),
-              c.getName()
+              carComponent.getId(),
+              carComponent.getWeight(),
+              carComponent.getPrice(),
+              carComponent.getManufacturer(),
+              carComponent.getName()
           )
       );
     }
     return componentDtos;
   }
 
-  /**
-   * Get a component using RestTemplate client.
-   *
-   * @param id component id
-   * @return Component object
-   */
-  public static CarComponent getComponentById(Long id) {
-    String url = GET_COMPONENT_URL + id;
-    ResponseEntity<CarComponent> response = client.getForEntity(url, CarComponent.class);
-    return response.getBody();
-  }
-
 }
diff --git a/car/src/main/java/cz/muni/pa165/car/service/CarDriverPairServiceImpl.java b/car/src/main/java/cz/muni/pa165/car/service/CarDriverPairServiceImpl.java
index 4f2dbbf8feeff309145e60a9e839185e979ca142..3c3f8e28157d693a0bf43a551c34b7029f944272 100644
--- a/car/src/main/java/cz/muni/pa165/car/service/CarDriverPairServiceImpl.java
+++ b/car/src/main/java/cz/muni/pa165/car/service/CarDriverPairServiceImpl.java
@@ -1,18 +1,17 @@
 package cz.muni.pa165.car.service;
 
 import cz.muni.pa165.car.data.repository.CarRepository;
-import cz.muni.pa165.common_library.dtos.CarRequestDto;
+import cz.muni.pa165.car.mapper.CarMapper;
 import cz.muni.pa165.common_library.dtos.CarResponseDto;
 import cz.muni.pa165.common_library.dtos.DriverDto;
 import cz.muni.pa165.common_library.exception.DatabaseException;
 import cz.muni.pa165.driver.data.model.Driver;
-
-import java.util.*;
-
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.http.ResponseEntity;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
 import org.springframework.stereotype.Service;
-import org.springframework.web.client.RestTemplate;
+
+import static cz.muni.pa165.car.restemplate.DbGetter.getDriverFromDb;
 
 /**
  * Service for Driver Manager.
@@ -20,10 +19,6 @@ import org.springframework.web.client.RestTemplate;
 @Service
 public class CarDriverPairServiceImpl implements CarDriverPairService {
 
-  @Autowired
-  private static RestTemplate client = new RestTemplate();
-
-  private static final String GET_DRIVER_URL = "http://localhost:8083/driver/get/id=";
   CarRepository carRepository;
 
   /**
@@ -39,27 +34,26 @@ public class CarDriverPairServiceImpl implements CarDriverPairService {
   public CarResponseDto assignDriverToCar(Long driverId, Long carId) {
     var car = carRepository.findById(carId).orElseThrow(
         () -> new DatabaseException("Car not found"));
-    var driver = getDriverById(driverId);
     var drivers = car.getDrivers();
-    drivers.add(driver);
+    drivers.add(driverId);
     car.setDrivers(drivers);
     carRepository.save(car);
-    return CarServiceImpl.carConverterToDto(car);
+    return CarMapper.carConverterToDto(car);
   }
 
   @Override
   public CarResponseDto unassignDriverFromCar(Long driverId, Long carId) {
     var car = carRepository.findById(carId).orElseThrow(
         () -> new DatabaseException("Car not found"));
-    var drivers = new ArrayList<Driver>();
-    for (Driver d : car.getDrivers()) {
-      if (!Objects.equals(d.getId(), driverId)) {
-        drivers.add(d);
+    var drivers = new ArrayList<Long>();
+    for (Long id : car.getDrivers()) {
+      if (!Objects.equals(id, driverId)) {
+        drivers.add(id);
       }
     }
     car.setDrivers(drivers);
     carRepository.save(car);
-    return CarServiceImpl.carConverterToDto(car);
+    return CarMapper.carConverterToDto(car);
   }
 
   @Override
@@ -67,11 +61,12 @@ public class CarDriverPairServiceImpl implements CarDriverPairService {
     var car = carRepository.findById(carId).orElseThrow(
         () -> new DatabaseException("Car not found"));
     var driverDtos = new ArrayList<DriverDto>();
-    for (Driver d : car.getDrivers()) {
+    for (Long id : car.getDrivers()) {
+      Driver driver = getDriverFromDb(id);
       driverDtos.add(
-          new DriverDto(d.getId(),
-              d.getName(),
-              d.getSurname())
+          new DriverDto(driver.getId(),
+              driver.getName(),
+              driver.getSurname())
       );
     }
     return driverDtos;
@@ -81,31 +76,18 @@ public class CarDriverPairServiceImpl implements CarDriverPairService {
   public CarResponseDto setMainDriver(Long carId, Long driverId) {
     var car = carRepository.findById(carId).orElseThrow(
         () -> new DatabaseException("Car not found"));
-    var driver = getDriverById(driverId);
-    car.setMainDriver(driver);
+    car.setMainDriverId(driverId);
     carRepository.save(car);
-    return CarServiceImpl.carConverterToDto(car);
+    return CarMapper.carConverterToDto(car);
   }
 
   @Override
   public CarResponseDto removeMainDriver(Long carId) {
     var car = carRepository.findById(carId).orElseThrow(
         () -> new DatabaseException("Car not found"));
-    car.setMainDriver(null);
+    car.setMainDriverId(null);
     carRepository.save(car);
-    return CarServiceImpl.carConverterToDto(car);
-  }
-
-  /**
-   * Get a driver using RestTemplate client.
-   *
-   * @param id driver id
-   * @return Driver object
-   */
-  public static Driver getDriverById(Long id) {
-    String url = GET_DRIVER_URL + id;
-    ResponseEntity<Driver> response = client.getForEntity(url, Driver.class);
-    return response.getBody();
+    return CarMapper.carConverterToDto(car);
   }
 
 }
diff --git a/car/src/main/java/cz/muni/pa165/car/service/CarService.java b/car/src/main/java/cz/muni/pa165/car/service/CarService.java
index 167a889350109be78ee610012600254de60d452c..f3b923a0ac0ff620324e657fe874c2dc7a357b45 100644
--- a/car/src/main/java/cz/muni/pa165/car/service/CarService.java
+++ b/car/src/main/java/cz/muni/pa165/car/service/CarService.java
@@ -2,7 +2,6 @@ package cz.muni.pa165.car.service;
 
 import cz.muni.pa165.common_library.dtos.CarRequestDto;
 import cz.muni.pa165.common_library.dtos.CarResponseDto;
-
 import java.util.List;
 
 /**
diff --git a/car/src/main/java/cz/muni/pa165/car/service/CarServiceImpl.java b/car/src/main/java/cz/muni/pa165/car/service/CarServiceImpl.java
index f2e2d1cf2f8c669bb37b276a5343fe6e6649fd9a..c8119d00d5170795c2d875c95ff9c6f06133c733 100644
--- a/car/src/main/java/cz/muni/pa165/car/service/CarServiceImpl.java
+++ b/car/src/main/java/cz/muni/pa165/car/service/CarServiceImpl.java
@@ -1,19 +1,15 @@
 package cz.muni.pa165.car.service;
 
-import cz.muni.pa165.car.data.model.Car;
 import cz.muni.pa165.car.data.repository.CarRepository;
+import cz.muni.pa165.car.mapper.CarMapper;
 import cz.muni.pa165.common_library.dtos.CarRequestDto;
 import cz.muni.pa165.common_library.dtos.CarResponseDto;
 import cz.muni.pa165.common_library.exception.DatabaseException;
-import cz.muni.pa165.component.data.model.CarComponent;
-import cz.muni.pa165.driver.data.model.Driver;
-import java.util.ArrayList;
 import java.util.List;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.util.Pair;
-import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
-import org.springframework.web.client.RestTemplate;
+
+import static cz.muni.pa165.car.mapper.CarMapper.carConverterToDto;
+import static cz.muni.pa165.car.mapper.CarMapper.carDtoConverter;
 
 /**
  * Service for car management.
@@ -21,12 +17,6 @@ import org.springframework.web.client.RestTemplate;
 @Service
 public class CarServiceImpl implements CarService {
 
-  @Autowired
-  private static RestTemplate client = new RestTemplate();
-
-  private static final String GET_DRIVER_URL = "http://localhost:8083/driver/get/id=";
-  private static final String GET_COMPONENT_URL = "http://localhost:8084/component?id=";
-
   CarRepository carRepository;
 
   /**
@@ -57,7 +47,7 @@ public class CarServiceImpl implements CarService {
     return carRepository
         .findAll()
         .stream()
-        .map(CarServiceImpl::carConverterToDto)
+        .map(CarMapper::carConverterToDto)
         .toList();
   }
 
@@ -67,86 +57,4 @@ public class CarServiceImpl implements CarService {
     return "Car with id = " + carId + " deleted!";
   }
 
-  /**
-   * Converts Dto object to Car object.
-   * TODO: Change to the correct version of converter.
-   *
-   * @param carRequestDto Dto object of the car.
-   * @return Car object.
-   */
-  public static Car carDtoConverter(CarRequestDto carRequestDto) {
-
-    var car = Car.builder().id(null).build();
-
-    var components = new ArrayList<CarComponent>();
-    for (Pair<Long, String> componentPair : carRequestDto.getComponentIdsNames()) {
-      Long id = componentPair.getFirst();
-      components.add(getComponentById(id));
-    }
-    car.setComponents(components);
-
-    var drivers = new ArrayList<Driver>();
-    for (Pair<Long, String> driverPair : carRequestDto.getDriverIdsNames()) {
-      Long id = driverPair.getFirst();
-      drivers.add(getDriverById(id));
-    }
-    car.setDrivers(drivers);
-
-    if (carRequestDto.getMainDriverId() != null) {
-      var mainDriver = getDriverById(carRequestDto.getMainDriverId());
-      car.setMainDriver(mainDriver);
-    }
-
-    return car;
-  }
-
-  /**
-   * Converts Car object to its Dto.
-   *
-   * @param car Car object.
-   * @return Dto object.
-   */
-  public static CarResponseDto carConverterToDto(Car car) {
-    Long id = null;
-    if (car.getMainDriver() != null) {
-      id = car.getMainDriver().getId();
-    }
-    return CarResponseDto.builder()
-        .id(car.getId())
-        .componentIdsNames(car.getComponents()
-            .stream()
-            .map(carComponent -> Pair.of(carComponent.getId(), carComponent.getName()))
-            .toList())
-        .driverIdsNames(car.getDrivers()
-            .stream()
-            .map(driver -> Pair.of(driver.getId(), driver.getName()))
-            .toList())
-        .mainDriverId(id)
-        .build();
-  }
-
-  /**
-   * Get a driver using RestTemplate client.
-   *
-   * @param id driver id
-   * @return Driver object
-   */
-  public static Driver getDriverById(Long id) {
-    String url = GET_DRIVER_URL + id;
-    ResponseEntity<Driver> response = client.getForEntity(url, Driver.class);
-    return response.getBody();
-  }
-
-  /**
-   * Get a component using RestTemplate client.
-   *
-   * @param id component id
-   * @return Component object
-   */
-  public static CarComponent getComponentById(Long id) {
-    String url = GET_COMPONENT_URL + id;
-    ResponseEntity<CarComponent> response = client.getForEntity(url, CarComponent.class);
-    return response.getBody();
-  }
-
 }
diff --git a/common_library/src/main/java/cz/muni/pa165/common_library/dtos/CarRequestDto.java b/common_library/src/main/java/cz/muni/pa165/common_library/dtos/CarRequestDto.java
index b52ce17fba05cdd2a9b76e8742992622cf14943c..7d4e4aa3c014b848a0aad1484f74f05ce62df19c 100644
--- a/common_library/src/main/java/cz/muni/pa165/common_library/dtos/CarRequestDto.java
+++ b/common_library/src/main/java/cz/muni/pa165/common_library/dtos/CarRequestDto.java
@@ -19,14 +19,14 @@ import org.springframework.data.util.Pair;
 public class CarRequestDto {
 
   @NotNull
-  @Schema(description = "car's components ids and names",
+  @Schema(description = "car's components ids",
           example     = "[]")
-  List<Pair<Long, String>> componentIdsNames;
+  List<Long> componentIds;
 
   @NotNull
-  @Schema(description = "car's drivers ids and names",
+  @Schema(description = "car's drivers ids",
           example     = "[]")
-  List<Pair<Long, String>> driverIdsNames;
+  List<Long> driverIds;
 
   @Schema(description = "id of car's main driver",
           example     = "null")
diff --git a/common_library/src/main/java/cz/muni/pa165/common_library/dtos/CarResponseDto.java b/common_library/src/main/java/cz/muni/pa165/common_library/dtos/CarResponseDto.java
index 0ce66d5feb613dc4875e1dc2762b3e589bd3431e..ddc8a224d96727bb85e6fa85a460cdd054ec8bc7 100644
--- a/common_library/src/main/java/cz/muni/pa165/common_library/dtos/CarResponseDto.java
+++ b/common_library/src/main/java/cz/muni/pa165/common_library/dtos/CarResponseDto.java
@@ -27,12 +27,12 @@ public class CarResponseDto {
   @NotNull
   @Schema(description = "car's components ids and names",
           example     = "[]")
-  List<Pair<Long, String>> componentIdsNames;
+  List<Long> componentIdsNames;
 
   @NotNull
   @Schema(description = "car's drivers ids and names",
           example     = "[]")
-  List<Pair<Long, String>> driverIdsNames;
+  List<Long> driverIdsNames;
 
   @Schema(description = "id of car's main driver",
           example     = "1")