Brook Trout are not genetically programmed to die after spawning as are the Pacific species of salmon. Spawning is however difficult and dangerous and many fish do die during spawning. The length of the incubation period varies according to the temperature - at lower temperatures the incubation period is longer.
More than half of the total length of the German autobahn network has no speed limit, about one third has a permanent limit, and the remaining parts have a temporary or conditional limit. Some cars with very powerful engines can reach speeds of well over 300 km/h (190 mph).
The speed limit for most business and residential areas is 25 mph. On secondary roads (those routes numbered 600 and above, with one exception), the limits are 45 mph for trucks and 55 mph for other vehicles. Effective July 1, 2014, a maximum speed limit of 35 mph applies to all unpaved roads statewide.The road does not have to be posted.