Gaps - Breaks in the traffic stream long enough to permit vehicles or pedestrians access across or into the traffic stream. Gore - The V-shaped area that separates through-traffic from exiting or entering traffic on freeways and highways. Grade Separation - A crossing that uses an underpass or overpass to eliminate conflict points.
Although blood pressure varies from person to person, a blood pressure reading of 90 millimeters of mercury (mm Hg) or less systolic blood pressure (the top number in a blood pressure reading) or 60 mm Hg or less diastolic blood pressure (the bottom number) is generally considered low blood pressure.
Many people worry about low blood pressure (hypotension), but probably don't need to. Some people have a blood pressure level that is lower than normal. In general this may be good news - because the lower your blood pressure is, the lower your risk of stroke or heart disease. However, in a few cases, having low blood pressure can cause problems, so you might need to speak to your doctor or nurse.