mallory moore is explaining. >> reporter: feel a little bit different. drivers could be sitting on these northbound on rams a little bit longer than normal. they are testing out the ramp meters -- on the ramps a little longer. they are testing out the ramp meters. the current system is on a preset schedule and this new technology allows the meters to change based on traffic flow. >> if the ramp meters not needed, that ramp meter will turn off earlier. >> reporter: this will last for three weeks and it will allow to adjust the meters. in phoenix, i am mallory moore , abc15 news. >>> all eyes are on hurricane matthew. the conditions are extremely dangerous in the caribbean. is bringing flooding rains to jamaica and haiti. and the hurricane is being lamed for four four. -- blamed for four deaths. is a category four storm. sitting just south of cuba, watch with this track does, keeping it as a category four overnight, it continues to move it to the north it takes a it is rated a very strong hurricane 3 and it moves towards florida and the east coast. we will

we have mallory moore explaining.>> reporter: it can boil your blood. drivers who wait until the last moment before merging. usually when you see a merge sign like this, you get over as soon as possible. drivers need to resist that urge and use both lanes for as long as possible. then, at a certain point, take turns in merging into the open lanes which is like a zipper closing. it is called a zipper merged year. initial results showed that the way to merge can save time for drivers, but only in certain situations.>> the zipper merge works in specific wrote projects where traffic is moving slowly to the merge area. merging earlier makes the merge longer.>> reporter: adot is reviewing the zipper data and we could see more in the future. >>> the final presidential debate is set to kick off in about half an hour. >>> we have more coming up in world news tonight. >>> from what we have learned, donald trump's strategy on the stage. we have pictures of a massive gas explosion. people smell the gas and many what do doctors from leading cancer centers in the cou

let's get to mallory moore to how to get around >> this is right at osborn. the southbound is closed from osborn to thomas. we are still seeing some slowing on the freeways. i want to give you a look at this crash. it is still slowing things down for westbound drivers. blocking the left side of the freeway. it is back to about greenville so you can take the 202 instead. >>> there will be extra officers lauvertd want you to go out and enjoy halloween but be sure to have plans to get home safely afterwards. do not drink and drive. the instructions are simple call 1-800-triple-a. >>> chill poet lay crawl over to and get a free small custard. >>> no 90s anywhere in our state. a high of 87. we will stay well below. 60s and 70s across arizona. you are going to be trick-or-treating that sun sets at 5:37. notice temperatures in the 70s by 8:00. i'm tom o'haer and i approve this messsage. paul babeu oversaw a place of horrors as headmaster of a school for at-risk youth. students were denied basic human rights and were subject to sexual abuse. arizona deserves better.

. >> traffic expert mallory moore here to help -- here with how to get around it. >> reporter: north of glendale you will see the closure. seventh street and seventh avenue will be your best options . besides that, freeways are like this morning, even the ten not seen delays in the west valley. >> the temperature in phoenix is down to 67. we dropped a few more degrees. nice and cool on the way to work with 60s across the valley. clear skies and light winds. today another warm one with a high back to the '90s. i'll bring your hour by hour this how warm the temperatures will get by lunch time in a bit . >> a fire being called suspicious. we are there after two of the family vehicles go up in flames. the fire was started in the driveway in the home on 75th avenue. the fire didn't spread to the home but they are calling the fire suspicious and the cause remains under investigation. >>> two teenagers recovering from gunshot wo is there story adding up? the teenagers were shot at 75th avenue and deer valley road. officers tell us they made online to exchange some items which police have no

. >>> mallory moore taking for us. >>> here we go, so you are current temperatures right now not so bad but it does feel muggy, 75 in mesa, 8 in tempe kill across the rest of the valley, mix of 0s and 0s, 80 in good year, 0 in surprise. 76 right now z is the temperature in gilbert. it is going to be a breeze i don't saturday, those winds will pick up throughout the day. by 10:00 it locks like we'll see 13 miles per hour, 14 miles per hour by 12. we could see gusts today, 20 miles per hour, even higher up in the high country so keep that in mind. here is a live look at abc desert doppler, fire up to the west of us let's zoom into that, it's right along the i-10 here north of buckeye towards litchfield and just west of good year. but you see that heavier orange cell is heading north towards litchfield park. if we head out to the far east valley by some lakes, south of chandler starting to see cells work up. i don't think it is going to be shower activity, even some lightning, too, crew in the west valleys are reporting they are seeing some lightning, too. that is something we'll keep a cl

as soon as we learn more we will pass it along but for moore's -- more on ways to get around let's head over to mallory. >>> loop 101 westbound closed at fox hill road and it's low in both directions because the eastside has been shut down. bell wrote hop down and use that and even deer valley can get you around and state route 51 can help out with the closures. take a look at the big picture. a lot of slowing. let's give you a look. we have a crash. adot is flipping our camera around. right it 24th street and allison rodriguez will have all the on the on ramp. sometimes when we have extra delays we see secondary crashes and i will give you an update in just a few minutes. >>> a lot of folks have to get out early and they have to get around the traffic backups. the temperatures are mild in the low 70s. phoenix down to 73 and that temperature will update shortly. we are in the low 70s but we will warm back into the 90s by lunch and our high today above average. 96 and i will show you how long we keep these temperatures in just minutes. >>> and allison rodriguez live along the 10 here near mcdowell and 1