If you are driving you should go at a normal speed that allows the traffic to flow. If you drive at a speed that is interfering with other cars that are going at a normal speed, this is a signal that you are going too slow and you should increase it as this can cause an accident as cars will try to pass your vehicle which is dangerous.
Many Americans of the time viewed the vices as executed by those by poor backgrounds and especially the blacks and Mexicans. The views however improved marginally in the 19c.