Radar

function radar(arr) {
    let speed = Number(arr[0]);
    let area = arr[1];
    function zone(area) {
        if(area == 'motorway') {return 130;}
        else if(area=='interstate'){return 90;}
        else if(area=='city'){return 50;}
        else if(area=='residential'){return 20;}
    }
    let overSpeed = zone(area)-speed;
    if(overSpeed<0){
        if(overSpeed>= -20){
            console.log('speeding')
        }
        else if((overSpeed>-20)&&(overSpeed<=-40)){
            console.log('excessive speeding ');
        }
        else {
            console.log('reckless driving');
        }
    }
}
radar([120, interstate]);