why did not properly redirect if else in controller in Laravel?

I am working with laravel 5.6. and in my application I have table name vehicles as like this,

id  name   model    year  categoryname  user_id
1   toyota  121     2001      car           1
2   nissan  sunney  1998      car           2
3   toyota  liteace 2000      van           5
4   isuzu   elf     2005      truck         9
5   bmw     520d    2010      car           7

now I need redirect each vechicle edit form acording to categoeyname of the vechicle table. I have controller edit function like this?

public function edit($id)
{
    if (Vehicle::where('categoryname', 'Car')) {

        $vehicles = Vehicle::find($id);
        $town_list = Town::with('district.province')->groupBy('provincename')->get();
        $model_list = DB::table('modols')

            ->groupBy('categoryname')
            ->get();
        return view('vehicles.caredit')->withVehicles($vehicles)->withTown_list($town_list)->withModel_list($model_list);
    }
    else if (Vehicle::where('categoryname', 'Van')){
        $vehicles = Vehicle::find($id);


        $town_list = Town::with('district.province')->groupBy('provincename')->get();
        $model_list = DB::table('modols')

            ->groupBy('categoryname')
            ->get();
        returnview('vehicles.vanedit')->withVehicles($vehicles)->withTown_list($town_list)->withModel_list($model_list);
    }
}

but when I redirect diffrent categoryname values like car and van those are allways redirect to caredit.blade.php. then how can I fix this problem?

via Chebli Mohamed