Police and firefighters have been called to a crash on the busiest road between Perth and Dundee.
A crane being transported on a low-loader struck the flyover at St Madoes.
It is feared the smash may have caused serious damage to the bridge and a structural engineer has been called out to assess its safety.
A water main has also been hit, leaving residents in the area without water.
Scottish Water said it had an engineer on site investigating the loss of supply.
The eastbound carriageway of the A90 has been closed since the incident occurred around 4.40pm.
No one in the truck or another vehicle involved in the collision is believed to have been hurt.
The low loader and crane remain on the carriage, around 90ft east of the flyover.
Traffic Scotland said vehicles were “at a stand” on the dual carriageway for as far back as Kinfauns, with a diversion put in place.
❗️NEW⌚️17:20#A90 northbound at St Madoes- RTC causing heavy traffic on approach.@NETrunkRoads @PerthandKinross pic.twitter.com/3eH29z4W9y
— Traffic Scotland (@trafficscotland) October 31, 2019
A police spokeswoman said: “Police were called at 4.40pm on Thursday following a two vehicle RTC on the A90 near Glencarse.
“Emergency services remain at the scene and the road is closed.
“It is unknown if there have been any injuries at this point.”
❗️UPDATE⌚️18:15#A90 northbound is CLOSED ⛔️at St Madoes due to an RTC.
Traffic at a stand on approach- local diversion in place at the moment.@NETrunkRoads @PerthandKinross pic.twitter.com/etVLP8wAgV
— Traffic Scotland (@trafficscotland) October 31, 2019
A fire and rescue spokeswoman said: “We are currently in attendance at an incident on the A90 just between Perth and Dundee.
“We received the call at 5pm. Four fire engines and a rescue unit are in attendance.”
A statement from Perth and Kinross Council read: “Due to an ongoing incident on the A90 eastbound direction (travelling to Dundee) the carriageway is closed to all traffic.
“Police Scotland and Bear Scotland are aware of the incident and local diversions will be put in place.
“At this time it is unknown how long the road will be closed and drivers are advised to avoid the area.”
We are currently investigating a loss of supply to customers in the #Perth #PH2 area. We will provide a further update as soon as more information becomes available. Apologies for any inconvenience caused this evening. https://t.co/R5FZIQHKAr
— Scottish Water (@scottish_water) October 31, 2019
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