My commute went from 2 miles to about 16.7 miles & to cope with this 5 days a week I went the electric assist bike route. It tops out at 20mph for the assist & pushing it while following some stop signs/lights I can make in just about an hour. I'm only 10-15 minutes longer average with the normal bike but much sweatier. There are e-bikes that top out at 28mph assisted that 20 miles could be done in about an hour & w/o a need to change clothes/shower.