function predkosc (thePlayer, cmd, player)
local team = getTeamFromName("Policja")
    if getPlayerTeam(thePlayer) == team then
    local pojazdpo = getPedOccupiedVehicle(thePlayer)
    local veh = getPedOccupiedVehicle(player)
      if ( player ) then
        if veh then
        local x,y,z = getElementPosition(veh) 
        local x1,y1,z1 = getElementPosition(pojazdpo)
        local dystans = getDistanceBetweenPoints3D ( x,y,z, x1,y1,z1 ) 
            if dystans > 20 then
                local sx,sy,sz = getElementVelocity(veh)
                local speed = math.floor(getDistanceBetweenPoints3D(0,0,0,getElementVelocity(veh)) * 100 * 1.61)
                outputChatBox("Pr?dko?? " ..getPlayerName(player).. " to: " ..speed.." kmh", source)
            else
            --Gracz znajduje sie zadaleko            
            end
        else
        --Gracz nie posiada pojazdu
        end
      else
      --podaj gracza
      end
    else
    --Nie jestes w policji    
    end
end 
addCommandHandler("predkosc",predkosc)

   local veh = getPedOccupiedVehicle(player)

addEventHandler ( "onClientPlayerTarget", root, function(cel)
    speedx, speedy, speedz = getElementVelocity ( getPedOccupiedVehicle(cel) )
    predkosc = (speedx^2 + speedy^2 + speedz^2)^(0.5) 
    kmh = predkosc * 180
    x,y,z = getElementPosition ( getPedOccupiedVehicle( cel ) )
    x1,y1,z1 = getElementPosition ( getLocalPlayer() )
    dystans = getDistanceBetweenPoints3D ( x,y,z,x1,y1,z1 )
    if dystans < 20 then
        kmh = math.floor(kmh)
        outputChatBox ( "Pr?dko?? : "..kmh, 255, 255, 255 )
    end
end)