Make driver was SPEEDING Recklessly 75mph in a 55mph speed zone, driver was TAILGATING us and almost rearended us, driver then passed on a double solid line, driver then cut in front of us without using any directional signals almost causing an accident. Male driver continued to speed 75mph to 80mph in a 55mph zo e then continued 65mph to 70mph in a 45mph speed zone. Driver then blown thru a stop sign without stopping almost hitting other mortist. Driver then failed to use a proper singal also. Driver then failed to use turn singal again while making another turn, he pulled out in front of traffic almost causing another accident. Driver then got into I-87 and was observed going at a high rate of speed bo less than 100mph in a 55mph speed zone. Insurance Company needs to get this information and take action.