Radar

function solve(input){

    let speed = input.shift()
    let zone = input.shift()

    switch (zone){
        case 'residential':
        if(speed>20 && speed<=40){
            console.log('speeding')
        }else if(speed>40 && speed<=60){
            console.log('excessive speeding')
        }else if(speed>60){
            console.log('reckless driving')
        }
        case 'city':
        if(speed>50 && speed<=70){
            console.log('speeding')
        }else if(speed>70 && speed<=90){
            console.log('excessive speeding')
        }else if(speed>90){
            console.log('reckless driving')
        }
        case 'interstate':
        if(speed>90 && speed<=110){
            console.log('speeding')
        }else if(speed>110 && speed<=130){
            console.log('excessive speeding')
        }else if(speed>130){
            console.log('reckless driving')
        }
        case 'motorway':
        if(speed>130 && speed<=150){
            console.log('speeding')
        }else if(speed>150 && speed<=170){
            console.log('excessive speeding')
        }else if(speed>170){
            console.log('reckless driving')
        }
    }
}
solve([21, 'residential'])
solve([120, 'interstate'])
solve([200, 'motorway'])