If you have problems with current game version or other mods, use the newest / working gameversion 
and edit these values to make sure this mod (LA Traffic/Population v2.2.4) still works.

Open the gameconfig.xml the want to use. Then, 
navigate to the header:
	<PoolData>
                      <Item>
                            <PoolName>Vehicles</PoolName>
                            <PoolSize value="600"/>
                        </Item>
                        <Item>
                            <PoolName>VehicleStreamRequest</PoolName>
                            <PoolSize value="190"/>
                        </Item>
                        <Item>
                            <PoolName>VehicleStreamRender</PoolName>
                            <PoolSize value="270"/>
                        </Item>
                        <Item>
                            <PoolName>VehicleStruct</PoolName>
                            <PoolSize value="420"/>
                        </Item>

      </PoolData>
and replace these 4 values as you wish



Then navigate to this header:
 < ConfigPopulation >
 
Replace the values with:

      <ConfigPopulation>
				     <ScenarioPedsMultiplier_Base value="70"/>
				     <ScenarioPedsMultiplier value="175"/>
				     <AmbientPedsMultiplier_Base value="175"/>
				     <AmbientPedsMultiplier value="255"/>	
				     <MaxTotalPeds_Base value="70"/>
				     <MaxTotalPeds value="200"/>
				     <PedMemoryMultiplier value="500"/>
				     <PedsForVehicles_Base value="75"/>
				     <PedsForVehicles value="150"/>
				     <VehicleTimesliceMaxUpdatesPerFrame_Base value="4"/>
				     <VehicleTimesliceMaxUpdatesPerFrame value="35"/>	<!-- from 10 -->
				     <VehicleAmbientDensityMultiplier_Base value="125"/>
				     <VehicleAmbientDensityMultiplier value="215"/>
				     <VehicleMemoryMultiplier value="500"/>
				     <VehicleParkedDensityMultiplier_Base value="50"/>
				     <VehicleParkedDensityMultiplier value="175"/>
				     <VehicleLowPrioParkedDensityMultiplier_Base value="50"/>
				     <VehicleLowPrioParkedDensityMultiplier value="135"/>
				     <VehicleUpperLimit_Base value="50"/>
				     <VehicleUpperLimit value="425"/>
				     <VehicleUpperLimitMP value="60"/>
				     <VehicleParkedUpperLimit_Base value="50"/>
				     <VehicleParkedUpperLimit value="160"/>
				     <VehicleKeyholeShapeInnerThickness_Base value="20"/>
				     <VehicleKeyholeShapeInnerThickness value="20"/>
				     <VehicleKeyholeShapeOuterThickness_Base value="40"/>
				     <VehicleKeyholeShapeOuterThickness value="40"/>
				     <VehicleKeyholeShapeInnerRadius_Base value="80"/>
				     <VehicleKeyholeShapeInnerRadius value="100"/>	<!-- from 120 -->
				     <VehicleKeyholeShapeOuterRadius_Base value="185"/>
				     <VehicleKeyholeShapeOuterRadius value="200"/>
				     <VehicleKeyholeSideWallThickness_Base value="60"/>
				     <VehicleKeyholeSideWallThickness value="60"/>
				     <VehicleMaxCreationDistance_Base value="225"/>
				     <VehicleMaxCreationDistance value="390"/>	<!--- from 250 -->
				     <VehicleMaxCreationDistanceOffscreen_Base value="50"/>
				     <VehicleMaxCreationDistanceOffscreen value="50"/>
				     <VehicleCullRange_Base value="251"/>
				     <VehicleCullRange value="391"/>	<!-- from 271 -->
				     <VehicleCullRangeOnScreenScale_Base value="140"/>
				     <VehicleCullRangeOnScreenScale value="140"/>
				     <VehicleCullRangeOffScreen_Base value="100"/>
				     <VehicleCullRangeOffScreen value="150"/>
				     <DensityBasedRemovalRateScale_Base value="36"/>
				     <DensityBasedRemovalRateScale value="36"/>
				     <DensityBasedRemovalTargetHeadroom_Base value="10"/>
				     <DensityBasedRemovalTargetHeadroom value="10"/>
				     <VehicleSpacing_Base>
				         <VehicleSpacing_0_Base value="1"/>
				         <VehicleSpacing_1_Base value="172"/>
				         <VehicleSpacing_2_Base value="150"/>
				         <VehicleSpacing_3_Base value="129"/>
				         <VehicleSpacing_4_Base value="110"/>
				         <VehicleSpacing_5_Base value="88"/>
				         <VehicleSpacing_6_Base value="55"/>
				         <VehicleSpacing_7_Base value="52"/>
				         <VehicleSpacing_8_Base value="45"/>
				         <VehicleSpacing_9_Base value="40"/>
				         <VehicleSpacing_10_Base value="34"/>
				         <VehicleSpacing_11_Base value="27"/>
				         <VehicleSpacing_12_Base value="22"/>
				         <VehicleSpacing_13_Base value="20"/>
				         <VehicleSpacing_14_Base value="19"/>
				         <VehicleSpacing_15_Base value="18"/>
				     </VehicleSpacing_Base>
				     <VehicleSpacing>
				         <VehicleSpacing_0 value="1"/>
				         <VehicleSpacing_1 value="172"/>
				         <VehicleSpacing_2 value="150"/>
				         <VehicleSpacing_3 value="129"/>
				         <VehicleSpacing_4 value="110"/>
				         <VehicleSpacing_5 value="88"/>
				         <VehicleSpacing_6 value="55"/>
				         <VehicleSpacing_7 value="52"/>
				         <VehicleSpacing_8 value="45"/>
				         <VehicleSpacing_9 value="40"/>
				         <VehicleSpacing_10 value="34"/>
				         <VehicleSpacing_11 value="27"/>
				         <VehicleSpacing_12 value="22"/>
				         <VehicleSpacing_13 value="20"/>
				         <VehicleSpacing_14 value="19"/>
				         <VehicleSpacing_15 value="18"/>
				     </VehicleSpacing>
				     <PlayersRoadScanDistance_Base value="300"/>
				     <PlayersRoadScanDistance value="400"/>
				     <PlayerRoadDensityInc_Base>
				         <PlayerRoadDensityInc_0_Base value="0"/>
				         <PlayerRoadDensityInc_1_Base value="0"/>
				         <PlayerRoadDensityInc_2_Base value="0"/>
				         <PlayerRoadDensityInc_3_Base value="0"/>
				         <PlayerRoadDensityInc_4_Base value="0"/>
				         <PlayerRoadDensityInc_5_Base value="0"/>
				         <PlayerRoadDensityInc_6_Base value="0"/>
				         <PlayerRoadDensityInc_7_Base value="0"/>
				         <PlayerRoadDensityInc_8_Base value="0"/>
				         <PlayerRoadDensityInc_9_Base value="0"/>
				         <PlayerRoadDensityInc_10_Base value="0"/>
				         <PlayerRoadDensityInc_11_Base value="0"/>
				         <PlayerRoadDensityInc_12_Base value="0"/>
				         <PlayerRoadDensityInc_13_Base value="0"/>
				         <PlayerRoadDensityInc_14_Base value="0"/>
				         <PlayerRoadDensityInc_15_Base value="0"/>
				     </PlayerRoadDensityInc_Base>
				     <PlayerRoadDensityInc>
				         <PlayerRoadDensityInc_0 value="1"/>
				         <PlayerRoadDensityInc_1 value="2"/>
				         <PlayerRoadDensityInc_2 value="2"/>
				         <PlayerRoadDensityInc_3 value="2"/>
				         <PlayerRoadDensityInc_4 value="2"/>
				         <PlayerRoadDensityInc_5 value="2"/>
				         <PlayerRoadDensityInc_6 value="3"/>
				         <PlayerRoadDensityInc_7 value="3"/>
				         <PlayerRoadDensityInc_8 value="3"/>
				         <PlayerRoadDensityInc_9 value="3"/>
				         <PlayerRoadDensityInc_10 value="3"/>
				         <PlayerRoadDensityInc_11 value="2"/>
				         <PlayerRoadDensityInc_12 value="2"/>
				         <PlayerRoadDensityInc_13 value="2"/>
				         <PlayerRoadDensityInc_14 value="1"/>
				         <PlayerRoadDensityInc_15 value="1"/>
				     </PlayerRoadDensityInc>
				     <NonPlayerRoadDensityDec_Base>
				         <NonPlayerRoadDensityDec_0_Base value="0"/>
				         <NonPlayerRoadDensityDec_1_Base value="0"/>
				         <NonPlayerRoadDensityDec_2_Base value="0"/>
				         <NonPlayerRoadDensityDec_3_Base value="1"/>
				         <NonPlayerRoadDensityDec_4_Base value="1"/>
				         <NonPlayerRoadDensityDec_5_Base value="1"/>
				         <NonPlayerRoadDensityDec_6_Base value="1"/>
				         <NonPlayerRoadDensityDec_7_Base value="2"/>
				         <NonPlayerRoadDensityDec_8_Base value="2"/>
				         <NonPlayerRoadDensityDec_9_Base value="2"/>
				         <NonPlayerRoadDensityDec_10_Base value="2"/>
				         <NonPlayerRoadDensityDec_11_Base value="2"/>
				         <NonPlayerRoadDensityDec_12_Base value="3"/>
				         <NonPlayerRoadDensityDec_13_Base value="3"/>
				         <NonPlayerRoadDensityDec_14_Base value="3"/>
				         <NonPlayerRoadDensityDec_15_Base value="3"/>
				     </NonPlayerRoadDensityDec_Base>
				     <NonPlayerRoadDensityDec>
				         <NonPlayerRoadDensityDec_0 value="0"/>
				         <NonPlayerRoadDensityDec_1 value="0"/>
				         <NonPlayerRoadDensityDec_2 value="0"/>
				         <NonPlayerRoadDensityDec_3 value="0"/>
				         <NonPlayerRoadDensityDec_4 value="0"/>
				         <NonPlayerRoadDensityDec_5 value="0"/>
				         <NonPlayerRoadDensityDec_6 value="0"/>
				         <NonPlayerRoadDensityDec_7 value="0"/>
				         <NonPlayerRoadDensityDec_8 value="0"/>
				         <NonPlayerRoadDensityDec_9 value="0"/>
				         <NonPlayerRoadDensityDec_10 value="0"/>
				         <NonPlayerRoadDensityDec_11 value="1"/>
				         <NonPlayerRoadDensityDec_12 value="2"/>
				         <NonPlayerRoadDensityDec_13 value="3"/>
				         <NonPlayerRoadDensityDec_14 value="4"/>
				         <NonPlayerRoadDensityDec_15 value="6"/>
				     </NonPlayerRoadDensityDec>
				     <VehiclePopulationFrameRate_Base value="20"/>
				     <VehiclePopulationFrameRate value="25"/>
				     <VehiclePopulationCyclesPerFrame_Base value="1"/>
				     <VehiclePopulationCyclesPerFrame value="1"/>
				     <VehiclePopulationFrameRateMP_Base value="15"/>
				     <VehiclePopulationFrameRateMP value="20"/>
				     <VehiclePopulationCyclesPerFrameMP_Base value="1"/>
				     <VehiclePopulationCyclesPerFrameMP value="1"/>
				     <PedPopulationFrameRate_Base value="20"/>
				     <PedPopulationFrameRate value="40"/>	<!-- from 25 -->
				     <PedPopulationCyclesPerFrame_Base value="1"/>
				     <PedPopulationCyclesPerFrame value="4"/> 	<!-- from 1 -->
				     <PedPopulationFrameRateMP_Base value="15"/>
				     <PedPopulationFrameRateMP value="20"/>
				     <PedPopulationCyclesPerFrameMP_Base value="1"/>
				     <PedPopulationCyclesPerFrameMP value="1"/>	
				 </ConfigPopulation>

just copy & paste.
