if(IsPlayerAdmin)
{
//The Ramp creating code here.
}

#include <a_samp>

#define RAMP 1632 //Ramp ID
#define DISTANCE 30.0 //Distance infront
#define TIME 5000 //duration of ramp in ms

new tempkey, ramp;
new Float: X, Float: Y, Float: Z, Float: A;
forward Delete(objectid);


public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    tempkey = newkeys - oldkeys;
    if(tempkey == 4)
    {
      if(IsPlayerAdmin(playerid))
      {
        GetXYInFrontOfPlayer(playerid, X, Y, Z, A);
        ramp = CreateObject(RAMP, X, Y, Z, 0.0, 0.0, A);
        SetTimerEx("Delete", TIME, 0, "d", ramp);
      }
    }
}

public Delete(objectid)
{
    DestroyObject(objectid);
    return 1;
}

stock GetXYInFrontOfPlayer(playerid, &Float:x, &Float:y, &Float:z, &Float:a)
{
    GetPlayerPos(playerid, x, y, z);
    GetPlayerFacingAngle(playerid, a);
    if (GetPlayerVehicleID(playerid))
    {
      GetVehicleZAngle(GetPlayerVehicleID(playerid), a);
    }
    x += (DISTANCE * floatsin(-a, degrees));
    y += (DISTANCE * floatcos(-a, degrees));
}